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update to .net 6
continuous-integration/drone/push Build was killed Details

This commit is contained in:
Ben Harris 2021-11-09 16:52:21 -05:00
parent bbd0d2b4db
commit 2c9737d6d2
35 changed files with 1557 additions and 1580 deletions
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2
.drone.yml
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@ -4,7 +4,7 @@ name: run
steps:
- name: run
image: mcr.microsoft.com/dotnet/sdk:latest
image: mcr.microsoft.com/dotnet/sdk:6.0
commands:
- dotnet test
- dotnet run --project aoc2019/aoc2019.csproj

100
aoc2019.test/Tests.cs
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@ -1,60 +1,58 @@
using System;
using System.Diagnostics;
using aoc2019.lib;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace aoc2019.test
namespace aoc2019.test;
[TestClass]
public class Tests
{
[TestClass]
public class Tests
[DataTestMethod]
[DataRow(typeof(Day01), "3394106", "5088280")]
[DataRow(typeof(Day02), "3085697", "9425")]
[DataRow(typeof(Day03), "1195", "91518")]
[DataRow(typeof(Day04), "1079", "699")]
[DataRow(typeof(Day05), "7692125", "14340395")]
[DataRow(typeof(Day06), "145250", "274")]
[DataRow(typeof(Day07), "19650", "35961106")]
[DataRow(typeof(Day08), "2413",
"\nxxx xx xxx xxxx xxx \nx x x x x x x x x \nxxx x x x x xxx \nx x x xxx x x x \nx x x x x x x x \nxxx xx x xxxx xxx ")]
[DataRow(typeof(Day09), "3409270027", "82760")]
[DataRow(typeof(Day10), "260", "608")]
[DataRow(typeof(Day11), "2054",
"\n # # ### #### #### ## ## # # ### \n # # # # # # # # # # # # # \n ## # # # ### # # # #### ### \n # # ### # # #### # # # # # \n # # # # # # # # # # # # # # \n # # # # #### #### # # ## # # ### ")]
[DataRow(typeof(Day12), "10635", "583523031727256")]
//[DataRow(typeof(Day13), "361", "after 7133 moves, the score is: 17590")]
[DataRow(typeof(Day14), "397771", "3126714")]
[DataRow(typeof(Day15), "280", "400")]
[DataRow(typeof(Day16), "90744714", "82994322")]
[DataRow(typeof(Day17), "2804", "")]
[DataRow(typeof(Day19), "114", "10671712")]
[DataRow(typeof(Day21), "", "")]
[DataRow(typeof(Day23), "23626", "19019")]
public void TestAllDays(Type dayType, string part1, string part2)
{
[DataTestMethod]
[DataRow(typeof(Day01), "3394106", "5088280")]
[DataRow(typeof(Day02), "3085697", "9425")]
[DataRow(typeof(Day03), "1195", "91518")]
[DataRow(typeof(Day04), "1079", "699")]
[DataRow(typeof(Day05), "7692125", "14340395")]
[DataRow(typeof(Day06), "145250", "274")]
[DataRow(typeof(Day07), "19650", "35961106")]
[DataRow(typeof(Day08), "2413",
"\nxxx xx xxx xxxx xxx \nx x x x x x x x x \nxxx x x x x xxx \nx x x xxx x x x \nx x x x x x x x \nxxx xx x xxxx xxx ")]
[DataRow(typeof(Day09), "3409270027", "82760")]
[DataRow(typeof(Day10), "260", "608")]
[DataRow(typeof(Day11), "2054",
"\n # # ### #### #### ## ## # # ### \n # # # # # # # # # # # # # \n ## # # # ### # # # #### ### \n # # ### # # #### # # # # # \n # # # # # # # # # # # # # # \n # # # # #### #### # # ## # # ### ")]
[DataRow(typeof(Day12), "10635", "583523031727256")]
//[DataRow(typeof(Day13), "361", "after 7133 moves, the score is: 17590")]
[DataRow(typeof(Day14), "397771", "3126714")]
[DataRow(typeof(Day15), "280", "400")]
[DataRow(typeof(Day16), "90744714", "82994322")]
[DataRow(typeof(Day17), "2804", "")]
[DataRow(typeof(Day19), "114", "10671712")]
[DataRow(typeof(Day21), "", "")]
[DataRow(typeof(Day23), "23626", "19019")]
public void TestAllDays(Type dayType, string part1, string part2)
{
// create day instance
var s = Stopwatch.StartNew();
var day = (Day) Activator.CreateInstance(dayType);
s.Stop();
Assert.IsNotNull(day, "failed to create day object");
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in constructor");
// create day instance
var s = Stopwatch.StartNew();
var day = (Day)Activator.CreateInstance(dayType);
s.Stop();
Assert.IsNotNull(day, "failed to create day object");
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in constructor");
// part 1
s.Reset();
s.Start();
var part1Actual = day.Part1();
s.Stop();
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in part1");
Assert.AreEqual(part1, part1Actual, $"Incorrect answer for Day {day.DayNumber} Part1");
// part 1
s.Reset();
s.Start();
var part1Actual = day.Part1();
s.Stop();
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in part1");
Assert.AreEqual(part1, part1Actual, $"Incorrect answer for Day {day.DayNumber} Part1");
// part 2
s.Reset();
s.Start();
var part2Actual = day.Part2();
s.Stop();
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in part2");
Assert.AreEqual(part2, part2Actual, $"Incorrect answer for Day {day.DayNumber} Part2");
}
// part 2
s.Reset();
s.Start();
var part2Actual = day.Part2();
s.Stop();
Console.WriteLine($"{s.ScaleMilliseconds()}ms elapsed in part2");
Assert.AreEqual(part2, part2Actual, $"Incorrect answer for Day {day.DayNumber} Part2");
}
}
}

2
aoc2019.test/aoc2019.test.csproj
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@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<TargetFramework>net6.0</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>

85
aoc2019/Day.cs
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@ -1,49 +1,44 @@
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using aoc2019.lib;
using System.Diagnostics;
namespace aoc2019
namespace aoc2019;
public abstract class Day
{
public abstract class Day
protected Day(int dayNumber, string puzzleName)
{
protected Day(int dayNumber, string puzzleName)
{
DayNumber = dayNumber;
PuzzleName = puzzleName;
}
public int DayNumber { get; }
public string PuzzleName { get; }
protected virtual IEnumerable<string> Input =>
File.ReadLines(FileName);
protected string FileName =>
Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"input/day{DayNumber,2:00}.in");
public void AllParts(bool verbose = true)
{
Console.WriteLine($"Day {DayNumber,2}: {PuzzleName}");
var s = Stopwatch.StartNew();
var part1 = Part1();
s.Stop();
Console.Write($"Part1: {part1,-15} ");
Console.WriteLine(verbose ? $"{s.ScaleMilliseconds()}ms elapsed" : "");
s.Reset();
s.Start();
var part2 = Part2();
s.Stop();
Console.Write($"Part2: {part2,-15} ");
Console.WriteLine(verbose ? $"{s.ScaleMilliseconds()}ms elapsed" : "");
Console.WriteLine();
}
public abstract string Part1();
public abstract string Part2();
DayNumber = dayNumber;
PuzzleName = puzzleName;
}
}
public int DayNumber { get; }
public string PuzzleName { get; }
protected virtual IEnumerable<string> Input =>
File.ReadLines(FileName);
protected string FileName =>
Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"input/day{DayNumber,2:00}.in");
public void AllParts(bool verbose = true)
{
Console.WriteLine($"Day {DayNumber,2}: {PuzzleName}");
var s = Stopwatch.StartNew();
var part1 = Part1();
s.Stop();
Console.Write($"Part1: {part1,-15} ");
Console.WriteLine(verbose ? $"{s.ScaleMilliseconds()}ms elapsed" : "");
s.Reset();
s.Start();
var part2 = Part2();
s.Stop();
Console.Write($"Part2: {part2,-15} ");
Console.WriteLine(verbose ? $"{s.ScaleMilliseconds()}ms elapsed" : "");
Console.WriteLine();
}
public abstract string Part1();
public abstract string Part2();
}

74
aoc2019/Day01.cs
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@ -1,43 +1,39 @@
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day01 : Day
{
public sealed class Day01 : Day
private readonly IEnumerable<int> masses;
public Day01() : base(1, "The Tyranny of the Rocket Equation")
{
private readonly IEnumerable<int> masses;
public Day01() : base(1, "The Tyranny of the Rocket Equation")
{
masses = Input.Select(int.Parse);
}
private static int FuelCost(int weight)
{
return weight / 3 - 2;
}
private static int FullCost(int cost)
{
int total = 0, newcost, tmp = cost;
while ((newcost = FuelCost(tmp)) >= 0)
{
total += newcost;
tmp = newcost;
}
return total;
}
public override string Part1()
{
return $"{masses.Sum(FuelCost)}";
}
public override string Part2()
{
return $"{masses.Sum(FullCost)}";
}
masses = Input.Select(int.Parse);
}
}
private static int FuelCost(int weight)
{
return weight / 3 - 2;
}
private static int FullCost(int cost)
{
int total = 0, newcost, tmp = cost;
while ((newcost = FuelCost(tmp)) >= 0)
{
total += newcost;
tmp = newcost;
}
return total;
}
public override string Part1()
{
return $"{masses.Sum(FuelCost)}";
}
public override string Part2()
{
return $"{masses.Sum(FullCost)}";
}
}

62
aoc2019/Day02.cs
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@ -1,46 +1,42 @@
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day02 : Day
{
public sealed class Day02 : Day
private readonly IEnumerable<int> input;
public Day02() : base(2, "1202 Program Alarm")
{
private readonly IEnumerable<int> input;
input = Input.First().Split(',').Select(int.Parse);
}
public Day02() : base(2, "1202 Program Alarm")
{
input = Input.First().Split(',').Select(int.Parse);
}
public int RunIntCode(int noun, int verb)
{
var v = input.ToList();
v[1] = noun;
v[2] = verb;
public int RunIntCode(int noun, int verb)
{
var v = input.ToList();
v[1] = noun;
v[2] = verb;
for (var i = 0; v[i] != 99; i += 4)
v[v[i + 3]] = v[i] switch
{
1 => v[v[i + 1]] + v[v[i + 2]],
2 => v[v[i + 1]] * v[v[i + 2]]
};
for (var i = 0; v[i] != 99; i += 4)
v[v[i + 3]] = v[i] switch
{
1 => v[v[i + 1]] + v[v[i + 2]],
2 => v[v[i + 1]] * v[v[i + 2]]
};
return v[0];
}
return v[0];
}
public override string Part1()
{
return $"{RunIntCode(12, 2)}";
}
public override string Part1()
{
return $"{RunIntCode(12, 2)}";
}
public override string Part2()
{
for (var i = 0; i < 100; i++)
public override string Part2()
{
for (var i = 0; i < 100; i++)
for (var j = 0; j < 100; j++)
if (RunIntCode(i, j) == 19690720)
return $"{100 * i + j}";
return string.Empty;
}
return string.Empty;
}
}
}

101
aoc2019/Day03.cs
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@ -1,57 +1,52 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day03 : Day
{
public sealed class Day03 : Day
private readonly IEnumerable<(int, int)> intersections;
private readonly List<Dictionary<(int, int), int>> wires;
public Day03() : base(3, "Crossed Wires")
{
private readonly IEnumerable<(int, int)> intersections;
private readonly List<Dictionary<(int, int), int>> wires;
public Day03() : base(3, "Crossed Wires")
{
wires = Input.Select(ParseWire).ToList();
intersections = wires[0].Keys.Intersect(wires[1].Keys);
}
public override string Part1()
{
return $"{intersections.Min(x => Math.Abs(x.Item1) + Math.Abs(x.Item2))}";
}
public override string Part2()
{
// add 2 to count (0, 0) on both lines
return $"{intersections.Min(x => wires[0][x] + wires[1][x]) + 2}";
}
private static Dictionary<(int, int), int> ParseWire(string line)
{
var r = new Dictionary<(int, int), int>();
int x = 0, y = 0, c = 0, i;
foreach (var step in line.Split(','))
{
var d = int.Parse(step.Substring(1));
switch (step[0])
{
case 'U':
for (i = 0; i < d; i++) r.TryAdd((x, ++y), c++);
break;
case 'D':
for (i = 0; i < d; i++) r.TryAdd((x, --y), c++);
break;
case 'R':
for (i = 0; i < d; i++) r.TryAdd((++x, y), c++);
break;
case 'L':
for (i = 0; i < d; i++) r.TryAdd((--x, y), c++);
break;
}
}
return r;
}
wires = Input.Select(ParseWire).ToList();
intersections = wires[0].Keys.Intersect(wires[1].Keys);
}
}
public override string Part1()
{
return $"{intersections.Min(x => Math.Abs(x.Item1) + Math.Abs(x.Item2))}";
}
public override string Part2()
{
// add 2 to count (0, 0) on both lines
return $"{intersections.Min(x => wires[0][x] + wires[1][x]) + 2}";
}
private static Dictionary<(int, int), int> ParseWire(string line)
{
var r = new Dictionary<(int, int), int>();
int x = 0, y = 0, c = 0, i;
foreach (var step in line.Split(','))
{
var d = int.Parse(step.Substring(1));
switch (step[0])
{
case 'U':
for (i = 0; i < d; i++) r.TryAdd((x, ++y), c++);
break;
case 'D':
for (i = 0; i < d; i++) r.TryAdd((x, --y), c++);
break;
case 'R':
for (i = 0; i < d; i++) r.TryAdd((++x, y), c++);
break;
case 'L':
for (i = 0; i < d; i++) r.TryAdd((--x, y), c++);
break;
}
}
return r;
}
}

87
aoc2019/Day04.cs
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@ -1,49 +1,46 @@
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day04 : Day
{
public sealed class Day04 : Day
private readonly int end;
private readonly int start;
public Day04() : base(4, "Secure Container")
{
private readonly int end;
private readonly int start;
public Day04() : base(4, "Secure Container")
{
var range = Input.First().Split('-').Select(int.Parse).ToList();
start = range[0];
end = range[1];
}
private bool IsValid(int i)
{
var prev = 0;
var hasDup = false;
foreach (var c in i.ToString())
{
var curr = c - '0';
if (curr < prev) return false;
if (curr == prev) hasDup = true;
prev = curr;
}
return i >= start && i <= end && hasDup;
}
private bool HasOnePair(int i)
{
var s = i.ToString();
return IsValid(i) && s.Select(c => s.Count(j => j == c)).Any(c => c == 2);
}
public override string Part1()
{
return $"{Enumerable.Range(start, end).Count(IsValid)}";
}
public override string Part2()
{
return $"{Enumerable.Range(start, end).Count(HasOnePair)}";
}
var range = Input.First().Split('-').Select(int.Parse).ToList();
start = range[0];
end = range[1];
}
}
private bool IsValid(int i)
{
var prev = 0;
var hasDup = false;
foreach (var c in i.ToString())
{
var curr = c - '0';
if (curr < prev) return false;
if (curr == prev) hasDup = true;
prev = curr;
}
return i >= start && i <= end && hasDup;
}
private bool HasOnePair(int i)
{
var s = i.ToString();
return IsValid(i) && s.Select(c => s.Count(j => j == c)).Any(c => c == 2);
}
public override string Part1()
{
return $"{Enumerable.Range(start, end).Count(IsValid)}";
}
public override string Part2()
{
return $"{Enumerable.Range(start, end).Count(HasOnePair)}";
}
}

130
aoc2019/Day05.cs
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@ -1,78 +1,74 @@
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day05 : Day
{
public sealed class Day05 : Day
private readonly IEnumerable<int> tape;
private int output;
public Day05() : base(5, "Sunny with a Chance of Asteroids")
{
private readonly IEnumerable<int> tape;
tape = Input.First().Split(',').Select(int.Parse);
}
private int output;
public Day05() : base(5, "Sunny with a Chance of Asteroids")
public void RunIntCode(List<int> v, int input)
{
var i = 0;
while (i < v.Count && v[i] != 99)
{
tape = Input.First().Split(',').Select(int.Parse);
}
public void RunIntCode(List<int> v, int input)
{
var i = 0;
while (i < v.Count && v[i] != 99)
int Val(int mode, int val)
{
int Val(int mode, int val)
{
return mode != 0 ? val : v[val];
}
return mode != 0 ? val : v[val];
}
var mode1 = v[i] / 100 % 10;
var mode2 = v[i] / 1000;
var mode1 = v[i] / 100 % 10;
var mode2 = v[i] / 1000;
switch (v[i] % 100)
{
case 1:
v[v[i + 3]] = Val(mode1, v[i + 1]) + Val(mode2, v[i + 2]);
i += 4;
break;
case 2:
v[v[i + 3]] = Val(mode1, v[i + 1]) * Val(mode2, v[i + 2]);
i += 4;
break;
case 3:
v[v[i + 1]] = input;
i += 2;
break;
case 4:
output = Val(mode1, v[i + 1]);
i += 2;
break;
case 5:
i = Val(mode1, v[i + 1]) == 0 ? i + 3 : Val(mode2, v[i + 2]);
break;
case 6:
i = Val(mode1, v[i + 1]) != 0 ? i + 3 : Val(mode2, v[i + 2]);
break;
case 7:
v[v[i + 3]] = Val(mode1, v[i + 1]) < Val(mode2, v[i + 2]) ? 1 : 0;
i += 4;
break;
case 8:
v[v[i + 3]] = Val(mode1, v[i + 1]) == Val(mode2, v[i + 2]) ? 1 : 0;
i += 4;
break;
}
switch (v[i] % 100)
{
case 1:
v[v[i + 3]] = Val(mode1, v[i + 1]) + Val(mode2, v[i + 2]);
i += 4;
break;
case 2:
v[v[i + 3]] = Val(mode1, v[i + 1]) * Val(mode2, v[i + 2]);
i += 4;
break;
case 3:
v[v[i + 1]] = input;
i += 2;
break;
case 4:
output = Val(mode1, v[i + 1]);
i += 2;
break;
case 5:
i = Val(mode1, v[i + 1]) == 0 ? i + 3 : Val(mode2, v[i + 2]);
break;
case 6:
i = Val(mode1, v[i + 1]) != 0 ? i + 3 : Val(mode2, v[i + 2]);
break;
case 7:
v[v[i + 3]] = Val(mode1, v[i + 1]) < Val(mode2, v[i + 2]) ? 1 : 0;
i += 4;
break;
case 8:
v[v[i + 3]] = Val(mode1, v[i + 1]) == Val(mode2, v[i + 2]) ? 1 : 0;
i += 4;
break;
}
}
public override string Part1()
{
RunIntCode(tape.ToList(), 1);
return $"{output}";
}
public override string Part2()
{
RunIntCode(tape.ToList(), 5);
return $"{output}";
}
}
}
public override string Part1()
{
RunIntCode(tape.ToList(), 1);
return $"{output}";
}
public override string Part2()
{
RunIntCode(tape.ToList(), 5);
return $"{output}";
}
}

64
aoc2019/Day06.cs
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@ -1,38 +1,34 @@
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day06 : Day
{
public sealed class Day06 : Day
private readonly Dictionary<string, string> input;
public Day06() : base(6, "Universal Orbit Map")
{
private readonly Dictionary<string, string> input;
public Day06() : base(6, "Universal Orbit Map")
{
input = Input.ToDictionary(i => i.Split(')')[1], i => i.Split(')')[0]);
}
private List<string> GetParents(string obj)
{
var res = new List<string>();
for (var curr = obj; curr != "COM"; curr = input[curr])
res.Add(curr);
res.Add("COM");
return res;
}
public override string Part1()
{
return $"{input.Keys.Sum(o => GetParents(o).Count - 1)}";
}
public override string Part2()
{
var you = GetParents("YOU");
var san = GetParents("SAN");
var common = 1;
for (; you[^common] == san[^common]; common++) ;
return $"{you.Count + san.Count - common * 2}";
}
input = Input.ToDictionary(i => i.Split(')')[1], i => i.Split(')')[0]);
}
}
private List<string> GetParents(string obj)
{
var res = new List<string>();
for (var curr = obj; curr != "COM"; curr = input[curr])
res.Add(curr);
res.Add("COM");
return res;
}
public override string Part1()
{
return $"{input.Keys.Sum(o => GetParents(o).Count - 1)}";
}
public override string Part2()
{
var you = GetParents("YOU");
var san = GetParents("SAN");
var common = 1;
for (; you[^common] == san[^common]; common++) ;
return $"{you.Count + san.Count - common * 2}";
}
}

121
aoc2019/Day07.cs
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@ -1,67 +1,62 @@
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day07 : Day
{
public sealed class Day07 : Day
private readonly IntCodeVM[] Amplifiers = new IntCodeVM[5];
public Day07() : base(7, "Amplification Circuit")
{
private readonly IntCodeVM[] Amplifiers = new IntCodeVM[5];
public Day07() : base(7, "Amplification Circuit")
{
for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(Input.First());
}
public override string Part1()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(0, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.Run(phase, i);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
public override string Part2()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(5, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.AddInput(phase);
}
var vms = new Queue<IntCodeVM>(Amplifiers);
while (vms.Count > 0)
{
var vm = vms.Dequeue();
var haltType = vm.Run(i);
if (haltType == IntCodeVM.HaltType.Waiting)
vms.Enqueue(vm);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(Input.First());
}
}
public override string Part1()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(0, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.Run(phase, i);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
public override string Part2()
{
long i, largest = 0;
foreach (var phaseSeq in Enumerable.Range(5, 5).Permute())
{
i = 0;
foreach (var (vm, phase) in Amplifiers.Zip(phaseSeq))
{
vm.Reset();
vm.AddInput(phase);
}
var vms = new Queue<IntCodeVM>(Amplifiers);
while (vms.Count > 0)
{
var vm = vms.Dequeue();
var haltType = vm.Run(i);
if (haltType == IntCodeVM.HaltType.Waiting)
vms.Enqueue(vm);
i = vm.Result;
}
if (i > largest)
largest = i;
}
return $"{largest}";
}
}

61
aoc2019/Day08.cs
View File

@ -1,37 +1,32 @@
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day08 : Day
{
public sealed class Day08 : Day
private readonly List<List<char>> photo;
public Day08() : base(8, "Space Image Format")
{
private readonly List<List<char>> photo;
public Day08() : base(8, "Space Image Format")
{
photo = Input.First().Chunk(25 * 6).Select(s => s.ToList()).ToList();
}
public override string Part1()
{
var l = photo.OrderBy(layer => layer.Count(pixel => pixel == '0')).First();
return $"{l.Count(p => p == '1') * l.Count(p => p == '2')}";
}
public override string Part2()
{
return "\n" + Enumerable.Range(0, 25 * 6)
.Select(p => Enumerable.Range(0, photo.Count)
.Select(l => photo[l][p])
.Aggregate('2', (acc, next) =>
acc != '2' ? acc : next == '0' ? ' ' : next
)
)
.ToDelimitedString()
.Chunk(25)
.ToDelimitedString("\n")
.Replace('1', 'x');
}
photo = Input.First().Chunk(25 * 6).Select(s => s.ToList()).ToList();
}
}
public override string Part1()
{
var l = photo.OrderBy(layer => layer.Count(pixel => pixel == '0')).First();
return $"{l.Count(p => p == '1') * l.Count(p => p == '2')}";
}
public override string Part2()
{
return "\n" + Enumerable.Range(0, 25 * 6)
.Select(p => Enumerable.Range(0, photo.Count)
.Select(l => photo[l][p])
.Aggregate('2', (acc, next) =>
acc != '2' ? acc : next == '0' ? ' ' : next
)
)
.ToDelimitedString()
.Chunk(25)
.ToDelimitedString("\n")
.Replace('1', 'x');
}
}

46
aoc2019/Day09.cs
View File

@ -1,29 +1,25 @@
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day09 : Day
{
public sealed class Day09 : Day
private readonly IntCodeVM vm;
public Day09() : base(9, "Sensor Boost")
{
private readonly IntCodeVM vm;
public Day09() : base(9, "Sensor Boost")
{
vm = new IntCodeVM(Input.First());
}
public override string Part1()
{
vm.Reset();
vm.Run(1);
return $"{vm.output.ToDelimitedString(",")}";
}
public override string Part2()
{
vm.Reset();
vm.Run(2);
return $"{vm.output.ToDelimitedString(",")}";
}
vm = new IntCodeVM(Input.First());
}
}
public override string Part1()
{
vm.Reset();
vm.Run(1);
return $"{vm.output.ToDelimitedString(",")}";
}
public override string Part2()
{
vm.Reset();
vm.Run(2);
return $"{vm.output.ToDelimitedString(",")}";
}
}

132
aoc2019/Day10.cs
View File

@ -1,73 +1,67 @@
using System;
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day10 : Day
{
public sealed class Day10 : Day
private readonly HashSet<(int x, int y)> asteroids;
private (int x, int y) best = (x: -1, y: -1);
private int bestCanSee;
public Day10() : base(10, "Monitoring Station")
{
private readonly HashSet<(int x, int y)> asteroids;
private (int x, int y) best = (x: -1, y: -1);
private int bestCanSee;
public Day10() : base(10, "Monitoring Station")
{
asteroids = Input
.Select((r, y) => r.Select((c, x) => (x, y, isAsteroid: c == '#')).ToArray())
.SelectMany(r => r)
.Where(a => a.isAsteroid)
.Select(a => (a.x, a.y))
.ToHashSet();
}
public override string Part1()
{
foreach (var asteroid in asteroids)
{
var canSee = asteroids
.Except(new[] {asteroid})
.Select(a => (x: a.x - asteroid.x, y: a.y - asteroid.y))
.GroupBy(a => Math.Atan2(a.y, a.x))
.Count();
if (canSee > bestCanSee)
{
best = asteroid;
bestCanSee = canSee;
}
}
return $"{bestCanSee}";
}
public override string Part2()
{
static IEnumerable<(int x, int y, double angle, double dist)> GetValue(
Queue<(int x, int y, double angle, double dist)> q)
{
if (q.Count > 0) yield return q.Dequeue();
}
return asteroids
.Where(a => a != best)
.Select(a =>
{
var xDist = a.x - best.x;
var yDist = a.y - best.y;
var angle = Math.Atan2(xDist, yDist);
return (a.x, a.y, angle, dist: Math.Sqrt(xDist * xDist + yDist * yDist));
})
.ToLookup(a => a.angle)
.OrderByDescending(a => a.Key)
.Select(a => new Queue<(int x, int y, double angle, double dist)>(a.OrderBy(b => b.dist)))
.Repeat()
.SelectMany(GetValue)
.Skip(199)
.Take(1)
.Select(a => a.x * 100 + a.y)
.Single()
.ToString();
}
asteroids = Input
.Select((r, y) => r.Select((c, x) => (x, y, isAsteroid: c == '#')).ToArray())
.SelectMany(r => r)
.Where(a => a.isAsteroid)
.Select(a => (a.x, a.y))
.ToHashSet();
}
}
public override string Part1()
{
foreach (var asteroid in asteroids)
{
var canSee = asteroids
.Except(new[] { asteroid })
.Select(a => (x: a.x - asteroid.x, y: a.y - asteroid.y))
.GroupBy(a => Math.Atan2(a.y, a.x))
.Count();
if (canSee > bestCanSee)
{
best = asteroid;
bestCanSee = canSee;
}
}
return $"{bestCanSee}";
}
public override string Part2()
{
static IEnumerable<(int x, int y, double angle, double dist)> GetValue(
Queue<(int x, int y, double angle, double dist)> q)
{
if (q.Count > 0) yield return q.Dequeue();
}
return asteroids
.Where(a => a != best)
.Select(a =>
{
var xDist = a.x - best.x;
var yDist = a.y - best.y;
var angle = Math.Atan2(xDist, yDist);
return (a.x, a.y, angle, dist: Math.Sqrt(xDist * xDist + yDist * yDist));
})
.ToLookup(a => a.angle)
.OrderByDescending(a => a.Key)
.Select(a => new Queue<(int x, int y, double angle, double dist)>(a.OrderBy(b => b.dist)))
.Repeat()
.SelectMany(GetValue)
.Skip(199)
.Take(1)
.Select(a => a.x * 100 + a.y)
.Single()
.ToString();
}
}

209
aoc2019/Day11.cs
View File

@ -1,111 +1,106 @@
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day11 : Day
{
public sealed class Day11 : Day
private readonly IntCodeVM vm;
private Direction heading;
private long x, y;
public Day11() : base(11, "Space Police")
{
private readonly IntCodeVM vm;
private Direction heading;
private long x, y;
public Day11() : base(11, "Space Police")
{
vm = new IntCodeVM(Input.First());
}
private void Move()
{
switch (heading)
{
case Direction.Up:
y++;
break;
case Direction.Down:
y--;
break;
case Direction.Left:
x--;
break;
case Direction.Right:
x++;
break;
}
;
}
private void Turn(long direction)
{
switch (heading)
{
case Direction.Up:
heading = direction == 0 ? Direction.Left : Direction.Right;
break;
case Direction.Down:
heading = direction == 0 ? Direction.Right : Direction.Left;
break;
case Direction.Left:
heading = direction == 0 ? Direction.Down : Direction.Up;
break;
case Direction.Right:
heading = direction == 0 ? Direction.Up : Direction.Down;
break;
}
Move();
}
private Dictionary<(long x, long y), long> PaintShip(int initialVal)
{
var map = new Dictionary<(long, long), long>();
vm.Reset();
heading = Direction.Up;
x = 0;
y = 0;
map[(x, y)] = initialVal;
var haltType = IntCodeVM.HaltType.Waiting;
while (haltType == IntCodeVM.HaltType.Waiting)
{
haltType = vm.Run(map.GetValueOrDefault((x, y)));
map[(x, y)] = vm.Result;
Turn(vm.Result);
}
return map;
}
public override string Part1()
{
return $"{PaintShip(0).Count}";
}
public override string Part2()
{
var map = PaintShip(1);
var minX = (int) map.Keys.Select(i => i.x).Min();
var maxX = (int) map.Keys.Select(i => i.x).Max();
var minY = (int) map.Keys.Select(i => i.y).Min();
var maxY = (int) map.Keys.Select(i => i.y).Max();
return "\n" + Enumerable.Range(minY, maxY - minY + 1)
.Select(j =>
Enumerable.Range(minX, maxX - minX + 1)
.Select(i => map.GetValueOrDefault((x: i, y: j)) == 0 ? ' ' : '#')
.ToDelimitedString()
)
.Reverse()
.ToDelimitedString("\n");
}
private enum Direction
{
Up,
Down,
Left,
Right
}
vm = new IntCodeVM(Input.First());
}
}
private void Move()
{
switch (heading)
{
case Direction.Up:
y++;
break;
case Direction.Down:
y--;
break;
case Direction.Left:
x--;
break;
case Direction.Right:
x++;
break;
}
;
}
private void Turn(long direction)
{
switch (heading)
{
case Direction.Up:
heading = direction == 0 ? Direction.Left : Direction.Right;
break;
case Direction.Down:
heading = direction == 0 ? Direction.Right : Direction.Left;
break;
case Direction.Left:
heading = direction == 0 ? Direction.Down : Direction.Up;
break;
case Direction.Right:
heading = direction == 0 ? Direction.Up : Direction.Down;
break;
}
Move();
}
private Dictionary<(long x, long y), long> PaintShip(int initialVal)
{
var map = new Dictionary<(long, long), long>();
vm.Reset();
heading = Direction.Up;
x = 0;
y = 0;
map[(x, y)] = initialVal;
var haltType = IntCodeVM.HaltType.Waiting;
while (haltType == IntCodeVM.HaltType.Waiting)
{
haltType = vm.Run(map.GetValueOrDefault((x, y)));
map[(x, y)] = vm.Result;
Turn(vm.Result);
}
return map;
}
public override string Part1()
{
return $"{PaintShip(0).Count}";
}
public override string Part2()
{
var map = PaintShip(1);
var minX = (int)map.Keys.Select(i => i.x).Min();
var maxX = (int)map.Keys.Select(i => i.x).Max();
var minY = (int)map.Keys.Select(i => i.y).Min();
var maxY = (int)map.Keys.Select(i => i.y).Max();
return "\n" + Enumerable.Range(minY, maxY - minY + 1)
.Select(j =>
Enumerable.Range(minX, maxX - minX + 1)
.Select(i => map.GetValueOrDefault((x: i, y: j)) == 0 ? ' ' : '#')
.ToDelimitedString()
)
.Reverse()
.ToDelimitedString("\n");
}
private enum Direction
{
Up,
Down,
Left,
Right
}
}

206
aoc2019/Day12.cs
View File

@ -1,127 +1,123 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day12 : Day
{
public sealed class Day12 : Day
private readonly List<Position> moons;
private int step;
public Day12() : base(12, "The N-Body Problem")
{
private readonly List<Position> moons;
private int step;
moons = Input
.Select(moon =>
moon
.TrimStart('<')
.TrimEnd('>')
.Split(",")
.Select(val => int.Parse(val.Split("=").Last()))
)
.Select(moon => new Position(moon.ToList()))
.ToList();
public Day12() : base(12, "The N-Body Problem")
foreach (var moon in moons)
moon.SetSiblings(moons);
}
public static long LCM(long a, long b)
{
return a * b / GCD(a, b);
}
public static long GCD(long a, long b)
{
if (b == 0) return a;
return GCD(b, a % b);
}
private void Step()
{
foreach (var moon in moons)
moon.Gravitate();
foreach (var moon in moons)
moon.Move();
step++;
}
public override string Part1()
{
while (step < 1000)
Step();
return $"{moons.Sum(p => p.TotalEnergy)}";
}
public override string Part2()
{
int cycleX = 0, cycleY = 0, cycleZ = 0;
while (cycleX == 0 || cycleY == 0 || cycleZ == 0)
{
moons = Input
.Select(moon =>
moon
.TrimStart('<')
.TrimEnd('>')
.Split(",")
.Select(val => int.Parse(val.Split("=").Last()))
)
.Select(moon => new Position(moon.ToList()))
.ToList();
foreach (var moon in moons)
moon.SetSiblings(moons);
Step();
if (cycleX == 0 && moons.All(m => m.dx == 0)) cycleX = step * 2;
if (cycleY == 0 && moons.All(m => m.dy == 0)) cycleY = step * 2;
if (cycleZ == 0 && moons.All(m => m.dz == 0)) cycleZ = step * 2;
}
public static long LCM(long a, long b)
return $"{LCM(cycleX, LCM(cycleY, cycleZ))}";
}
public class Position
{
public int dx, dy, dz;
private List<Position> siblings;
public int x, y, z;
public Position(IList<int> moon)
{
return a * b / GCD(a, b);
x = moon[0];
y = moon[1];
z = moon[2];
dx = 0;
dy = 0;
dz = 0;
siblings = new();
}
public static long GCD(long a, long b)
internal int KineticEnergy =>
Math.Abs(x) + Math.Abs(y) + Math.Abs(z);
internal int PotentialEnergy =>
Math.Abs(dx) + Math.Abs(dy) + Math.Abs(dz);
internal int TotalEnergy =>
KineticEnergy * PotentialEnergy;
public void SetSiblings(List<Position> positions)
{
if (b == 0) return a;
return GCD(b, a % b);
siblings = positions.Where(p => p != this).ToList();
}
private void Step()
public override string ToString()
{
foreach (var moon in moons)
moon.Gravitate();
foreach (var moon in moons)
moon.Move();
step++;
return $"pos=<x={x}, y={y}, z={z}> vel=<x={dx}, y={dy}, z={dz}>";
}
public override string Part1()
internal void Gravitate()
{
while (step < 1000)
Step();
return $"{moons.Sum(p => p.TotalEnergy)}";
foreach (var m in siblings)
{
if (x != m.x) dx += x > m.x ? -1 : 1;
if (y != m.y) dy += y > m.y ? -1 : 1;
if (z != m.z) dz += z > m.z ? -1 : 1;
}
}
public override string Part2()
internal void Move()
{
int cycleX = 0, cycleY = 0, cycleZ = 0;
while (cycleX == 0 || cycleY == 0 || cycleZ == 0)
{
Step();
if (cycleX == 0 && moons.All(m => m.dx == 0)) cycleX = step * 2;
if (cycleY == 0 && moons.All(m => m.dy == 0)) cycleY = step * 2;
if (cycleZ == 0 && moons.All(m => m.dz == 0)) cycleZ = step * 2;
}
return $"{LCM(cycleX, LCM(cycleY, cycleZ))}";
}
public class Position
{
public int dx, dy, dz;
private List<Position> siblings;
public int x, y, z;
public Position(IList<int> moon)
{
x = moon[0];
y = moon[1];
z = moon[2];
dx = 0;
dy = 0;
dz = 0;
}
internal int KineticEnergy =>
Math.Abs(x) + Math.Abs(y) + Math.Abs(z);
internal int PotentialEnergy =>
Math.Abs(dx) + Math.Abs(dy) + Math.Abs(dz);
internal int TotalEnergy =>
KineticEnergy * PotentialEnergy;
public void SetSiblings(List<Position> positions)
{
siblings = positions.Where(p => p != this).ToList();
}
public override string ToString()
{
return $"pos=<x={x}, y={y}, z={z}> vel=<x={dx}, y={dy}, z={dz}>";
}
internal void Gravitate()
{
foreach (var m in siblings)
{
if (x != m.x) dx += x > m.x ? -1 : 1;
if (y != m.y) dy += y > m.y ? -1 : 1;
if (z != m.z) dz += z > m.z ? -1 : 1;
}
}
internal void Move()
{
x += dx;
y += dy;
z += dz;
}
x += dx;
y += dy;
z += dz;
}
}
}
}

150
aoc2019/Day13.cs
View File

@ -1,87 +1,81 @@
using System;
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day13 : Day
{
public sealed class Day13 : Day
private readonly Dictionary<(int x, int y), int> board;
private readonly IntCodeVM vm;
public Day13() : base(13, "Care Package")
{
private readonly Dictionary<(int x, int y), int> board;
vm = new IntCodeVM(Input.First());
board = new Dictionary<(int, int), int>();
}
private readonly IntCodeVM vm;
private void UpdateTiles(IEnumerable<long> queue)
{
var input = queue.Select(i => (int)i).ToList();
public Day13() : base(13, "Care Package")
for (var i = 0; i < input.Count - 2; i += 3)
{
vm = new IntCodeVM(Input.First());
board = new Dictionary<(int, int), int>();
}
var x = input[i];
var y = input[i + 1];
var val = input[i + 2];
private void UpdateTiles(IEnumerable<long> queue)
{
var input = queue.Select(i => (int) i).ToList();
for (var i = 0; i < input.Count - 2; i += 3)
{
var x = input[i];
var y = input[i + 1];
var val = input[i + 2];
if (board.ContainsKey((x, y)))
board[(x, y)] = val;
else
board.Add((x, y), val);
}
}
private void PrintBoard()
{
foreach (var ((x, y), value) in board)
{
if (x < 0 || y < 0) continue;
Console.SetCursorPosition(x, y);
Console.Write(value switch
{
0 => " ",
1 => "|",
2 => "B",
3 => "_",
4 => ".",
_ => value
});
}
}
public override string Part1()
{
vm.Reset();
vm.Run();
return $"{vm.output.Where((v, i) => (i + 1) % 3 == 0 && v == 2).Count()}";
}
public override string Part2()
{
vm.Reset();
vm.memory[0] = 2;
var printBoard = false;
var gameTicks = 0;
if (printBoard) Console.Clear();
var haltType = IntCodeVM.HaltType.Waiting;
while (haltType == IntCodeVM.HaltType.Waiting)
{
haltType = vm.Run();
UpdateTiles(vm.output);
var (ball, _) = board.First(t => t.Value == 4).Key;
var (paddle, _) = board.First(t => t.Value == 3).Key;
vm.AddInput(ball > paddle ? 1 : ball < paddle ? -1 : 0);
gameTicks++;
if (printBoard) PrintBoard();
}
return $"after {gameTicks} moves, the score is: {board[(-1, 0)]}";
if (board.ContainsKey((x, y)))
board[(x, y)] = val;
else
board.Add((x, y), val);
}
}
}
private void PrintBoard()
{
foreach (var ((x, y), value) in board)
{
if (x < 0 || y < 0) continue;
Console.SetCursorPosition(x, y);
Console.Write(value switch
{
0 => " ",
1 => "|",
2 => "B",
3 => "_",
4 => ".",
_ => value
});
}
}
public override string Part1()
{
vm.Reset();
vm.Run();
return $"{vm.output.Where((v, i) => (i + 1) % 3 == 0 && v == 2).Count()}";
}
public override string Part2()
{
vm.Reset();
vm.memory[0] = 2;
var printBoard = false;
var gameTicks = 0;
if (printBoard) Console.Clear();
var haltType = IntCodeVM.HaltType.Waiting;
while (haltType == IntCodeVM.HaltType.Waiting)
{
haltType = vm.Run();
UpdateTiles(vm.output);
var (ball, _) = board.First(t => t.Value == 4).Key;
var (paddle, _) = board.First(t => t.Value == 3).Key;
vm.AddInput(ball > paddle ? 1 : ball < paddle ? -1 : 0);
gameTicks++;
if (printBoard) PrintBoard();
}
return $"after {gameTicks} moves, the score is: {board[(-1, 0)]}";
}
}

171
aoc2019/Day14.cs
View File

@ -1,110 +1,107 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace aoc2019;
namespace aoc2019
public sealed class Day14 : Day
{
public sealed class Day14 : Day
private readonly Dictionary<string, Reaction> reactions;
private Dictionary<string, long> available;
public Day14() : base(14, "Space Stoichiometry")
{
private readonly Dictionary<string, Reaction> reactions;
reactions = Input
.Select(Reaction.Parse)
.ToDictionary(r => r.product.Name);
available = new();
}
private Dictionary<string, long> available;
private bool Consume(string chem, long quantity)
{
if (quantity <= 0)
throw new ArgumentOutOfRangeException(nameof(quantity));
public Day14() : base(14, "Space Stoichiometry")
{
reactions = Input
.Select(Reaction.Parse)
.ToDictionary(r => r.product.Name);
}
if (!available.ContainsKey(chem))
available[chem] = 0;
private bool Consume(string chem, long quantity)
{
if (quantity <= 0)
throw new ArgumentOutOfRangeException(nameof(quantity));
if (available[chem] < quantity && !Produce(chem, quantity - available[chem]))
return false;
if (!available.ContainsKey(chem))
available[chem] = 0;
available[chem] -= quantity;
return true;
}
if (available[chem] < quantity && !Produce(chem, quantity - available[chem]))
private bool Produce(string chem, long quantity)
{
if (chem == "ORE")
return false;
var reaction = reactions[chem];
var reactionCount = (long)Math.Ceiling((double)quantity / reaction.product.Quantity);
foreach (var reactant in reaction.reactants)
if (!Consume(reactant.Name, reactionCount * reactant.Quantity))
return false;
available[chem] -= quantity;
return true;
available[chem] = available.GetValueOrDefault(chem) + reactionCount * reaction.product.Quantity;
return true;
}
public override string Part1()
{
available = new Dictionary<string, long> { { "ORE", long.MaxValue } };
Consume("FUEL", 1);
return $"{long.MaxValue - available["ORE"]}";
}
public override string Part2()
{
const long capacity = 1_000_000_000_000;
available = new Dictionary<string, long> { { "ORE", capacity } };
Consume("FUEL", 1);
var oreConsumed = capacity - available["ORE"];
while (Produce("FUEL", Math.Max(1, available["ORE"] / oreConsumed)))
{
}
private bool Produce(string chem, long quantity)
return $"{available["FUEL"] + 1}";
}
private struct Component
{
public string Name { get; set; }
public int Quantity { get; set; }
}
private class Reaction
{
public readonly Component product;
public readonly Component[] reactants;
private Reaction(Component[] reactants, Component product)
{
if (chem == "ORE")
return false;
var reaction = reactions[chem];
var reactionCount = (long) Math.Ceiling((double) quantity / reaction.product.Quantity);
foreach (var reactant in reaction.reactants)
if (!Consume(reactant.Name, reactionCount * reactant.Quantity))
return false;
available[chem] = available.GetValueOrDefault(chem) + reactionCount * reaction.product.Quantity;
return true;
this.reactants = reactants;
this.product = product;
}
public override string Part1()
public static Reaction Parse(string s)
{
available = new Dictionary<string, long> {{"ORE", long.MaxValue}};
Consume("FUEL", 1);
return $"{long.MaxValue - available["ORE"]}";
}
var ss = s.Split(new[] { ", ", " => " }, StringSplitOptions.None);
public override string Part2()
{
const long capacity = 1_000_000_000_000;
available = new Dictionary<string, long> {{"ORE", capacity}};
Consume("FUEL", 1);
return new Reaction(
ss.Take(ss.Length - 1).Select(ParseComponent).ToArray(),
ParseComponent(ss[^1])
);
var oreConsumed = capacity - available["ORE"];
while (Produce("FUEL", Math.Max(1, available["ORE"] / oreConsumed)))
static Component ParseComponent(string s)
{
}
return $"{available["FUEL"] + 1}";
}
private struct Component
{
public string Name { get; set; }
public int Quantity { get; set; }
}
private class Reaction
{
public readonly Component product;
public readonly Component[] reactants;
private Reaction(Component[] reactants, Component product)
{
this.reactants = reactants;
this.product = product;
}
public static Reaction Parse(string s)
{
var ss = s.Split(new[] {", ", " => "}, StringSplitOptions.None);
return new Reaction(
ss.Take(ss.Length - 1).Select(ParseComponent).ToArray(),
ParseComponent(ss[^1])
);
static Component ParseComponent(string s)
var spl = s.Split(' ', 2);
return new Component
{
var spl = s.Split(' ', 2);
return new Component
{
Quantity = int.Parse(spl[0]),
Name = spl[1]
};
}
Quantity = int.Parse(spl[0]),
Name = spl[1]
};
}
}
}
}
}

352
aoc2019/Day15.cs
View File

@ -1,224 +1,206 @@
using System;
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day15 : Day
{
public sealed class Day15 : Day
private readonly bool verbose = false;
private readonly IntCodeVM vm;
public Day15() : base(15, "Oxygen System")
{
private readonly bool verbose = false;
private readonly IntCodeVM vm;
vm = new IntCodeVM(Input.First());
}
public Day15() : base(15, "Oxygen System")
public override string Part1()
{
vm.Reset();
var currentLocation = new Location(0, 0);
var halt = IntCodeVM.HaltType.Waiting;
while (halt == IntCodeVM.HaltType.Waiting)
{
vm = new IntCodeVM(Input.First());
}
public override string Part1()
{
vm.Reset();
var currentLocation = new Location(0, 0);
var halt = IntCodeVM.HaltType.Waiting;
while (halt == IntCodeVM.HaltType.Waiting)
var direction = currentLocation!.NextDirection();
if (direction <= 4)
{
var direction = currentLocation.NextDirection();
if (direction <= 4)
var (x, y) = currentLocation.Neighbor(direction);
if (Location.GetLocation(x, y) == null)
{
var (x, y) = currentLocation.Neighbor(direction);
if (Location.GetLocation(x, y) == null)
halt = vm.Run(direction);
currentLocation = vm.Result switch
{
halt = vm.Run(direction);
switch (vm.Result)
{
case Location.Wall:
new Location(x, y, Location.Opposites[direction], Location.Wall);
break;
case Location.Empty:
currentLocation = new Location(x, y, Location.Opposites[direction]);
break;
case Location.System:
currentLocation = new Location(x, y, Location.Opposites[direction], Location.System);
break;
default:
throw new Exception($"Unknown IntCodeVM response: {vm.Result}");
}
}
Location.Wall => new Location(x, y, Location.Opposites[direction], Location.Wall),
Location.Empty => new Location(x, y, Location.Opposites[direction]),
Location.System => new Location(x, y, Location.Opposites[direction], Location.System),
_ => throw new Exception($"Unknown IntCodeVM response: {vm.Result}"),
};
}
}
else
{
direction = currentLocation.PreviousDirection;
if (direction > 0)
{
halt = vm.Run(direction);
currentLocation = vm.Result switch
{
Location.Empty or Location.System => Location.GetLocation(currentLocation.Neighbor(direction)),
_ => throw new Exception($"Unknown or unexpected response for previous room: {vm.Result}"),
};
}
else
{
direction = currentLocation.PreviousDirection;
if (direction > 0)
if (verbose)
{
halt = vm.Run(direction);
switch (vm.Result)
// find extents of canvas
int xMin, xMax, yMin, yMax;
xMin = yMin = int.MaxValue;
xMax = yMax = int.MinValue;
foreach (var (x, y) in Location.AllLocations.Keys)
{
case Location.Empty:
case Location.System:
currentLocation = Location.GetLocation(currentLocation.Neighbor(direction));
break;
default:
throw new Exception($"Unknown or unexpected response for previous room: {vm.Result}");
if (x < xMin) xMin = x;
if (x > xMax) xMax = x;
if (y < yMin) yMin = y;
if (y > yMax) yMax = y;
}
Console.WriteLine($"Canvas extends from ({xMin}, {yMin}) to ({xMax}, {yMax})");
// print board
for (var y = yMin; y <= yMax; y++)
{
var line = "";
for (var x = xMin; x <= xMax; x++)
if (Location.AllLocations.ContainsKey((x, y)))
line += Location.AllLocations[(x, y)].Image();
else
line += "@";
Console.WriteLine(line);
}
}
else
currentLocation = Location.OxygenLocation;
var distance = 0;
while (currentLocation?.PreviousDirection != 0)
{
if (verbose)
{
// find extents of canvas
int xMin, xMax, yMin, yMax;
xMin = yMin = int.MaxValue;
xMax = yMax = int.MinValue;
foreach (var (x, y) in Location.AllLocations.Keys)
{
if (x < xMin) xMin = x;
if (x > xMax) xMax = x;
if (y < yMin) yMin = y;
if (y > yMax) yMax = y;
}
Console.WriteLine($"Canvas extends from ({xMin}, {yMin}) to ({xMax}, {yMax})");
// print board
for (var y = yMin; y <= yMax; y++)
{
var line = "";
for (var x = xMin; x <= xMax; x++)
if (Location.AllLocations.ContainsKey((x, y)))
line += Location.AllLocations[(x, y)].Image();
else
line += "@";
Console.WriteLine(line);
}
}
currentLocation = Location.OxygenLocation;
var distance = 0;
while (currentLocation.PreviousDirection != 0)
{
distance++;
currentLocation = Location.GetLocation(currentLocation.PreviousLocation());
}
return $"{distance}";
distance++;
currentLocation = Location.GetLocation(currentLocation!.PreviousLocation());
}
return $"{distance}";
}
}
return "";
}
public override string Part2()
{
var changed = true;
while (changed)
{
changed = false;
foreach (var location in Location.AllLocations.Values)
changed = location.UpdateDistanceToOxygenSystem() || changed;
}
return "";
}
return Location.AllLocations.Values
.Where(l => !l.IsWall)
.Max(l => l.DistanceToOxygenSystem)
.ToString();
public override string Part2()
{
var changed = true;
while (changed)
{
changed = false;
foreach (var location in Location.AllLocations.Values)
changed = location.UpdateDistanceToOxygenSystem() || changed;
}
private class Location
return Location.AllLocations.Values
.Where(l => !l.IsWall)
.Max(l => l.DistanceToOxygenSystem)
.ToString();
}
private class Location
{
public const int Wall = 0;
public const int Empty = 1;
public const int System = 2;
private static readonly int[] Dx = { 0, 0, 0, 1, -1 };
private static readonly int[] Dy = { 0, 1, -1, 0, 0 };
public static readonly int[] Opposites = { 0, 2, 1, 4, 3 };
public static readonly Dictionary<(int x, int y), Location> AllLocations = new();
private readonly int currentType;
public int DistanceToOxygenSystem = int.MaxValue - 1;
private int searchDirection = 1;
public Location(int x, int y, int prev = 0, int type = Empty)
{
public const int Wall = 0;
public const int Empty = 1;
public const int System = 2;
PreviousDirection = prev;
currentType = type;
X = x;
Y = y;
private static readonly int[] Dx = {0, 0, 0, 1, -1};
private static readonly int[] Dy = {0, 1, -1, 0, 0};
public static readonly int[] Opposites = {0, 2, 1, 4, 3};
public static readonly Dictionary<(int x, int y), Location>
AllLocations = new Dictionary<(int x, int y), Location>();
private readonly int currentType;
public int DistanceToOxygenSystem = int.MaxValue - 1;
private int searchDirection = 1;
public Location(int x, int y, int prev = 0, int type = Empty)
if (type == System)
{
PreviousDirection = prev;
currentType = type;
X = x;
Y = y;
OxygenLocation = this;
DistanceToOxygenSystem = 0;
// Console.WriteLine($"Found Oxygen System at ({x}, {y})");
}
if (type == System)
AllLocations.Add((x, y), this);
}
public static Location? OxygenLocation { get; private set; }
public int PreviousDirection { get; }
private int X { get; }
private int Y { get; }
public bool IsWall => currentType == Wall;
public string Image()
{
return currentType switch
{
Wall => "\u2587",
Empty => X == 0 && Y == 0 ? "S" : " ",
System => "O",
_ => "?"
};
}
public bool UpdateDistanceToOxygenSystem()
{
if (currentType != Empty) return false;
foreach (var direction in Enumerable.Range(1, 4))
{
var distance = GetLocation(Neighbor(direction))?.DistanceToOxygenSystem ?? int.MaxValue;
if (distance + 1 < DistanceToOxygenSystem)
{
OxygenLocation = this;
DistanceToOxygenSystem = 0;
// Console.WriteLine($"Found Oxygen System at ({x}, {y})");
DistanceToOxygenSystem = distance + 1;
return true;
}
AllLocations.Add((x, y), this);
}
public static Location OxygenLocation { get; private set; }
public int PreviousDirection { get; }
private int X { get; }
private int Y { get; }
return false;
}
public bool IsWall => currentType == Wall;
public (int, int) Neighbor(int direction)
{
return (X + Dx[direction], Y + Dy[direction]);
}
public string Image()
{
return currentType switch
{
Wall => "\u2587",
Empty => X == 0 && Y == 0 ? "S" : " ",
System => "O",
_ => "?"
};
}
public (int, int) PreviousLocation()
{
return Neighbor(PreviousDirection);
}
public bool UpdateDistanceToOxygenSystem()
{
if (currentType != Empty) return false;
public int NextDirection()
{
return searchDirection++;
}
foreach (var direction in Enumerable.Range(1, 4))
{
var distance = GetLocation(Neighbor(direction))?.DistanceToOxygenSystem ?? int.MaxValue;
if (distance + 1 < DistanceToOxygenSystem)
{
DistanceToOxygenSystem = distance + 1;
return true;
}
}
public static Location? GetLocation(int x, int y)
{
return AllLocations.ContainsKey((x, y)) ? AllLocations[(x, y)] : null;
}
return false;
}
public (int, int) Neighbor(int direction)
{
return (X + Dx[direction], Y + Dy[direction]);
}
public (int, int) PreviousLocation()
{
return Neighbor(PreviousDirection);
}
public int NextDirection()
{
return searchDirection++;
}
public static Location GetLocation(int x, int y)
{
return AllLocations.ContainsKey((x, y)) ? AllLocations[(x, y)] : null;
}
public static Location GetLocation((int x, int y) coords)
{
return GetLocation(coords.x, coords.y);
}
public static Location? GetLocation((int x, int y) coords)
{
return GetLocation(coords.x, coords.y);
}
}
}
}

114
aoc2019/Day16.cs
View File

@ -1,64 +1,58 @@
using System;
using System.Collections.Generic;
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day16 : Day
{
public sealed class Day16 : Day
private static readonly int[] BasePattern = { 0, 1, 0, -1 };
private readonly int[] initialList;
public Day16() : base(16, "Flawed Frequency Transmission")
{
private static readonly int[] BasePattern = {0, 1, 0, -1};
private readonly int[] initialList;
public Day16() : base(16, "Flawed Frequency Transmission")
{
initialList = Input.First().Select(c => int.Parse($"{c}")).ToArray();
}
public override string Part1()
{
const int phaseCount = 100;
var signal0 = initialList.ToArray();
var signal1 = new int[signal0.Length];
for (var i = 0; i < phaseCount; i++)
CalculateSignal(i % 2 == 0 ? signal0 : signal1, i % 2 == 0 ? signal1 : signal0);
return new string(
signal0.Take(8).Select(c => (char) (c + '0'))
.ToArray());
}
public override string Part2()
{
const int phaseCount = 100;
var messageOffset = initialList.Take(7).Aggregate((n, i) => n * 10 + i);
var signal = initialList.Repeat(10_000).Skip(messageOffset).ToArray();
for (var p = 0; p < phaseCount; p++)
{
signal[^1] %= 10;
for (var i = signal.Length - 2; i >= 0; i--)
signal[i] = (signal[i + 1] + signal[i]) % 10;
}
return new string(signal.Take(8).Select(c => (char) (c + '0')).ToArray());
}
private static void CalculateSignal(IReadOnlyList<int> input, IList<int> output)
{
for (var outputIndex = 0; outputIndex < output.Count; outputIndex++)
output[outputIndex] =
Math.Abs(PatternValues(outputIndex, input.Count).Select((pv, i) => pv * input[i] % 10).Sum()) % 10;
}
private static IEnumerable<int> PatternValues(int index, int count)
{
return BasePattern
.SelectMany(v => Enumerable.Repeat(v, index + 1))
.Repeat(int.MaxValue)
.Skip(1)
.Take(count);
}
initialList = Input.First().Select(c => int.Parse($"{c}")).ToArray();
}
}
public override string Part1()
{
const int phaseCount = 100;
var signal0 = initialList.ToArray();
var signal1 = new int[signal0.Length];
for (var i = 0; i < phaseCount; i++)
CalculateSignal(i % 2 == 0 ? signal0 : signal1, i % 2 == 0 ? signal1 : signal0);
return new string(
signal0.Take(8).Select(c => (char)(c + '0'))
.ToArray());
}
public override string Part2()
{
const int phaseCount = 100;
var messageOffset = initialList.Take(7).Aggregate((n, i) => n * 10 + i);
var signal = initialList.Repeat(10_000).Skip(messageOffset).ToArray();
for (var p = 0; p < phaseCount; p++)
{
signal[^1] %= 10;
for (var i = signal.Length - 2; i >= 0; i--)
signal[i] = (signal[i + 1] + signal[i]) % 10;
}
return new string(signal.Take(8).Select(c => (char)(c + '0')).ToArray());
}
private static void CalculateSignal(IReadOnlyList<int> input, IList<int> output)
{
for (var outputIndex = 0; outputIndex < output.Count; outputIndex++)
output[outputIndex] =
Math.Abs(PatternValues(outputIndex, input.Count).Select((pv, i) => pv * input[i] % 10).Sum()) % 10;
}
private static IEnumerable<int> PatternValues(int index, int count)
{
return BasePattern
.SelectMany(v => Enumerable.Repeat(v, index + 1))
.Repeat(int.MaxValue)
.Skip(1)
.Take(count);
}
}

72
aoc2019/Day17.cs
View File

@ -1,32 +1,27 @@
using System;
using System.Linq;
using System.Text;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day17 : Day
{
public sealed class Day17 : Day
private readonly bool Verbose = false;
private readonly IntCodeVM vm;
public Day17() : base(17, "Set and Forget")
{
private readonly bool Verbose = false;
private readonly IntCodeVM vm;
vm = new IntCodeVM(Input.First());
}
public Day17() : base(17, "Set and Forget")
{
vm = new IntCodeVM(Input.First());
}
public override string Part1()
{
vm.Reset();
vm.Run();
var sb = new StringBuilder();
while (vm.output.Any())
sb.Append((char)vm.Result);
if (Verbose) Console.Write(sb);
var grid = sb.ToString().Trim().Split().Select(s => s.ToCharArray()).ToArray();
public override string Part1()
{
vm.Reset();
vm.Run();
var sb = new StringBuilder();
while (vm.output.Any())
sb.Append((char) vm.Result);
if (Verbose) Console.Write(sb);
var grid = sb.ToString().Trim().Split().Select(s => s.ToCharArray()).ToArray();
var sum = 0;
for (var y = 1; y < grid.Length - 1; y++)
var sum = 0;
for (var y = 1; y < grid.Length - 1; y++)
for (var x = 1; x < grid[y].Length - 1; x++)
if (grid[y][x] == '#' &&
grid[y - 1][x] == '#' &&
@ -35,19 +30,18 @@ namespace aoc2019
grid[y][x + 1] == '#')
sum += x * y;
return $"{sum}";
}
public override string Part2()
{
//vm.Reset();
//vm.memory[0] = 2;
//var halt = IntCodeVM.HaltType.Waiting;
//while (halt == IntCodeVM.HaltType.Waiting)
//{
// halt = vm.Run();
//}
return "";
}
return $"{sum}";
}
}
public override string Part2()
{
//vm.Reset();
//vm.memory[0] = 2;
//var halt = IntCodeVM.HaltType.Waiting;
//while (halt == IntCodeVM.HaltType.Waiting)
//{
// halt = vm.Run();
//}
return "";
}
}

18
aoc2019/Day18.cs Normal file
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@ -0,0 +1,18 @@
namespace aoc2019;
public sealed class Day18 : Day
{
public Day18() : base(18, "Many-Worlds Interpretation")
{
}
public override string Part1()
{
return "";
}
public override string Part2()
{
return "";
}
}

58
aoc2019/Day19.cs
View File

@ -1,22 +1,19 @@
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day19 : Day
{
public sealed class Day19 : Day
private readonly long[,] grid;
private readonly IntCodeVM vm;
public Day19() : base(19, "Tractor Beam")
{
private readonly long[,] grid;
private readonly IntCodeVM vm;
vm = new IntCodeVM(Input.First());
grid = new long[50, 50];
}
public Day19() : base(19, "Tractor Beam")
{
vm = new IntCodeVM(Input.First());
grid = new long[50, 50];
}
public override string Part1()
{
for (var x = 0; x < 50; x++)
public override string Part1()
{
for (var x = 0; x < 50; x++)
for (var y = 0; y < 50; y++)
{
vm.Reset();
@ -24,26 +21,25 @@ namespace aoc2019
grid[x, y] = vm.Result;
}
return $"{grid.Cast<long>().Sum()}";
}
return $"{grid.Cast<long>().Sum()}";
}
public override string Part2()
public override string Part2()
{
for (int x = 101, y = 0; ; x++)
{
for (int x = 101, y = 0;; x++)
while (true)
{
while (true)
{
vm.Reset();
vm.Run(x, y);
if (vm.Result == 1) break;
y++;
}
vm.Reset();
vm.Run(x - 99, y + 99);
if (vm.Result == 1)
return $"{(x - 99) * 1e4 + y}";
vm.Run(x, y);
if (vm.Result == 1) break;
y++;
}
vm.Reset();
vm.Run(x - 99, y + 99);
if (vm.Result == 1)
return $"{(x - 99) * 1e4 + y}";
}
}
}
}

18
aoc2019/Day20.cs Normal file
View File

@ -0,0 +1,18 @@
namespace aoc2019;
public sealed class Day20 : Day
{
public Day20() : base(20, "Donut Maze")
{
}
public override string Part1()
{
return "";
}
public override string Part2()
{
return "";
}
}

42
aoc2019/Day21.cs
View File

@ -1,27 +1,23 @@
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day21 : Day
{
public sealed class Day21 : Day
private readonly IntCodeVM vm;
public Day21() : base(21, "Springdroid Adventure")
{
private readonly IntCodeVM vm;
public Day21() : base(21, "Springdroid Adventure")
{
vm = new IntCodeVM(Input.First());
}
public override string Part1()
{
vm.Reset();
var halt = vm.Run();
return "";
}
public override string Part2()
{
return "";
}
vm = new IntCodeVM(Input.First());
}
}
public override string Part1()
{
vm.Reset();
var halt = vm.Run();
return "";
}
public override string Part2()
{
return "";
}
}

18
aoc2019/Day22.cs Normal file
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@ -0,0 +1,18 @@
namespace aoc2019;
public sealed class Day22 : Day
{
public Day22() : base(22, "Slam Shuffle")
{
}
public override string Part1()
{
return "";
}
public override string Part2()
{
return "";
}
}

142
aoc2019/Day23.cs
View File

@ -1,90 +1,86 @@
using System.Linq;
using aoc2019.lib;
namespace aoc2019;
namespace aoc2019
public sealed class Day23 : Day
{
public sealed class Day23 : Day
public Day23() : base(23, "Category Six")
{
public Day23() : base(23, "Category Six")
{
}
}
public override string Part1()
{
var vms = Enumerable.Range(0, 50)
.Select((s, i) =>
{
var vm = new IntCodeVM(Input.First());
vm.Run(i);
return vm;
}).ToList();
public override string Part1()
{
var vms = Enumerable.Range(0, 50)
.Select((s, i) =>
{
var vm = new IntCodeVM(Input.First());
vm.Run(i);
return vm;
}).ToList();
while (true)
foreach (var vm in vms)
while (true)
foreach (var vm in vms)
{
while (vm.output.Count > 0)
{
while (vm.output.Count > 0)
var destination = (int)vm.Result;
var x = vm.Result;
var y = vm.Result;
if (destination == 255) return $"{y}";
vms[destination].Run(x, y);
}
vm.Run(-1);
}
}
public override string Part2()
{
var vms = Enumerable.Range(0, 50)
.Select((s, i) =>
{
var vm = new IntCodeVM(Input.First());
vm.Run(i);
return vm;
}).ToList();
long natX = 0, natY = 0, lastYSent = -1;
while (true)
{
var numIdle = 0;
foreach (var vm in vms)
{
var isIdle = true;
while (vm.output.Count > 0)
{
var destination = (int)vm.Result;
var x = vm.Result;
var y = vm.Result;
if (destination == 255)
{
natX = x;
natY = y;
}
else
{
var destination = (int) vm.Result;
var x = vm.Result;
var y = vm.Result;
if (destination == 255) return $"{y}";
vms[destination].Run(x, y);
}
vm.Run(-1);
isIdle = false;
}
}
public override string Part2()
{
var vms = Enumerable.Range(0, 50)
.Select((s, i) =>
{
var vm = new IntCodeVM(Input.First());
vm.Run(i);
return vm;
}).ToList();
vm.Run(-1);
if (isIdle) numIdle++;
}
long natX = 0, natY = 0, lastYSent = -1;
while (true)
if (numIdle == 50)
{
var numIdle = 0;
foreach (var vm in vms)
{
var isIdle = true;
while (vm.output.Count > 0)
{
var destination = (int) vm.Result;
var x = vm.Result;
var y = vm.Result;
if (destination == 255)
{
natX = x;
natY = y;
}
else
{
vms[destination].Run(x, y);
}
isIdle = false;
}
vm.Run(-1);
if (isIdle) numIdle++;
}
if (numIdle == 50)
{
if (natY == lastYSent) return $"{natY}";
vms[0].Run(natX, natY);
lastYSent = natY;
}
if (natY == lastYSent) return $"{natY}";
vms[0].Run(natX, natY);
lastYSent = natY;
}
}
}
}
}

18
aoc2019/Day24.cs Normal file
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@ -0,0 +1,18 @@
namespace aoc2019;
public sealed class Day24 : Day
{
public Day24() : base(24, "Planet of Discord")
{
}
public override string Part1()
{
return "";
}
public override string Part2()
{
return "";
}
}

18
aoc2019/Day25.cs Normal file
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@ -0,0 +1,18 @@
namespace aoc2019;
public sealed class Day25 : Day
{
public Day25() : base(25, "Cryostasis")
{
}
public override string Part1()
{
return "";
}
public override string Part2()
{
return "";
}
}

45
aoc2019/Extensions.cs Normal file
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@ -0,0 +1,45 @@
using System.Diagnostics;
namespace aoc2019;
public static class Extensions
{
public static IEnumerable<IEnumerable<T>> Permute<T>(this IEnumerable<T> list)
{
if (list.Count() == 1) return new[] { list };
return list.SelectMany(t => Permute(list.Where(x => !x!.Equals(t))), (v, p) => p.Prepend(v));
}
public static IEnumerable<string> Chunk(this string str, int chunkSize)
{
for (var i = 0; i < str.Length; i += chunkSize)
yield return str.Substring(i, chunkSize);
}
public static string ToDelimitedString<T>(this IEnumerable<T> enumerable, string delimiter = "")
{
return string.Join(delimiter, enumerable);
}
public static IEnumerable<T> Repeat<T>(this IEnumerable<T> sequence, int? count = null)
{
while (count == null || count-- > 0)
foreach (var item in sequence)
yield return item;
}
/// <summary>
/// increased accuracy for stopwatch based on frequency.
/// <see
/// href="http://geekswithblogs.net/BlackRabbitCoder/archive/2012/01/12/c.net-little-pitfalls-stopwatch-ticks-are-not-timespan-ticks.aspx">
/// blog
/// details here
/// </see>
/// </summary>
/// <param name="stopwatch"></param>
/// <returns></returns>
public static double ScaleMilliseconds(this Stopwatch stopwatch)
{
return 1_000 * stopwatch.ElapsedTicks / (double)Stopwatch.Frequency;
}
}

155
aoc2019/IntCodeVM.cs Normal file
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namespace aoc2019;
public class IntCodeVM
{
public enum HaltType
{
Terminate,
Waiting
}
private readonly long[] program;
private long i;
public Queue<long> input, output;
public long[] memory;
private long relativeBase;
public IntCodeVM(string tape)
{
i = 0;
relativeBase = 0;
program = tape.Split(',').Select(long.Parse).ToArray();
memory = program;
input = new Queue<long>();
output = new Queue<long>();
}
public long Result => output.Dequeue();
public void Reset()
{
i = 0;
relativeBase = 0;
memory = program;
input.Clear();
output.Clear();
}
public void AddInput(params long[] values)
{
foreach (var v in values) AddInput(v);
}
public void AddInput(long value)
{
input.Enqueue(value);
}
private long MemGet(long addr)
{
return addr < memory.Length ? memory[addr] : 0;
}
private void MemSet(long addr, long value)
{
if (addr < 0) addr = 0;
if (addr >= memory.Length)
Array.Resize(ref memory, (int)addr + 1);
memory[addr] = value;
}
private long Mode(long idx)
{
var mode = MemGet(i) / 100;
for (var s = 1; s < idx; s++)
mode /= 10;
return mode % 10;
}
private long Get(long idx)
{
var param = MemGet(i + idx);
return Mode(idx) switch
{
0 => MemGet(param),
1 => param,
2 => MemGet(relativeBase + param),
_ => throw new Exception("invalid parameter mode"),
};
}
private void Set(long idx, long val)
{
var param = MemGet(i + idx);
switch (Mode(idx))
{
case 0:
MemSet(param, val);
break;
case 1: throw new Exception("cannot set in immediate mode");
case 2:
MemSet(relativeBase + param, val);
break;
default: throw new Exception("invalid parameter mode");
}
}
public HaltType Run(params long[] additionalInput)
{
foreach (var s in additionalInput) AddInput(s);
return Run();
}
public HaltType Run()
{
while (i < memory.Length)
{
var op = MemGet(i) % 100;
switch (op)
{
case 1:
Set(3, Get(1) + Get(2));
i += 4;
break;
case 2:
Set(3, Get(1) * Get(2));
i += 4;
break;
case 3:
if (!input.Any())
return HaltType.Waiting;
Set(1, input.Dequeue());
i += 2;
break;
case 4:
output.Enqueue(Get(1));
i += 2;
break;
case 5:
i = Get(1) == 0 ? i + 3 : Get(2);
break;
case 6:
i = Get(1) != 0 ? i + 3 : Get(2);
break;
case 7:
Set(3, Get(1) < Get(2) ? 1 : 0);
i += 4;
break;
case 8:
Set(3, Get(1) == Get(2) ? 1 : 0);
i += 4;
break;
case 9:
relativeBase += Get(1);
i += 2;
break;
case 99:
return HaltType.Terminate;
default:
throw new Exception($"unknown op {op} at {i}");
}
}
return HaltType.Terminate;
}
}

45
aoc2019/Program.cs
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@ -1,32 +1,29 @@
using System;
using System.Linq;
using System.Reflection;
using System.Reflection;
namespace aoc2019
namespace aoc2019;
internal static class Program
{
internal static class Program
private static void Main(string[] args)
{
private static void Main(string[] args)
var days =
Assembly.GetExecutingAssembly().GetTypes()
.Where(t => t.BaseType == typeof(Day))
.Select(t => Activator.CreateInstance(t) as Day)
.OrderBy(d => d?.DayNumber);
if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
{
var days =
Assembly.GetExecutingAssembly().GetTypes()
.Where(t => t.BaseType == typeof(Day))
.Select(t => (Day) Activator.CreateInstance(t))
.OrderBy(d => d.DayNumber);
var day = days.FirstOrDefault(d => d?.DayNumber == dayNum);
if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
{
var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
if (day != null)
day.AllParts();
else
Console.WriteLine($"{dayNum} invalid or not yet implemented");
}
if (day != null)
day.AllParts();
else
{
foreach (var d in days) d.AllParts();
}
Console.WriteLine($"{dayNum} invalid or not yet implemented");
}
else
{
foreach (var d in days) d?.AllParts();
}
}
}
}

11
aoc2019/aoc2019.csproj
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@ -2,7 +2,9 @@
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
<TargetFramework>net6.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
@ -11,4 +13,11 @@
</None>
</ItemGroup>
<ItemGroup>
<Using Include="System.Collections.Generic" />
<Using Include="System.Collections.Immutable" />
<Using Include="System.Text" />
<Using Include="System.Text.RegularExpressions" />
</ItemGroup>
</Project>

48
aoc2019/lib/Extensions.cs
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@ -1,48 +0,0 @@
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
namespace aoc2019.lib
{
public static class Extensions
{
public static IEnumerable<IEnumerable<T>> Permute<T>(this IEnumerable<T> list)
{
if (list.Count() == 1) return new[] {list};
return list.SelectMany(t => Permute(list.Where(x => !x.Equals(t))), (v, p) => p.Prepend(v));
}
public static IEnumerable<string> Chunk(this string str, int chunkSize)
{
for (var i = 0; i < str.Length; i += chunkSize)
yield return str.Substring(i, chunkSize);
}
public static string ToDelimitedString<T>(this IEnumerable<T> enumerable, string delimiter = "")
{
return string.Join(delimiter, enumerable);
}
public static IEnumerable<T> Repeat<T>(this IEnumerable<T> sequence, int? count = null)
{
while (count == null || count-- > 0)
foreach (var item in sequence)
yield return item;
}
/// <summary>
/// increased accuracy for stopwatch based on frequency.
/// <see
/// href="http://geekswithblogs.net/BlackRabbitCoder/archive/2012/01/12/c.net-little-pitfalls-stopwatch-ticks-are-not-timespan-ticks.aspx">
/// blog
/// details here
/// </see>
/// </summary>
/// <param name="stopwatch"></param>
/// <returns></returns>
public static double ScaleMilliseconds(this Stopwatch stopwatch)
{
return 1_000 * stopwatch.ElapsedTicks / (double) Stopwatch.Frequency;
}
}
}

160
aoc2019/lib/IntCodeVM.cs
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@ -1,160 +0,0 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace aoc2019.lib
{
public class IntCodeVM
{
public enum HaltType
{
Terminate,
Waiting
}
private readonly long[] program;
private long i;
public Queue<long> input, output;
public long[] memory;
private long relativeBase;
public IntCodeVM(string tape)
{
i = 0;
relativeBase = 0;
program = tape.Split(',').Select(long.Parse).ToArray();
memory = program;
input = new Queue<long>();
output = new Queue<long>();
}
public long Result => output.Dequeue();
public void Reset()
{
i = 0;
relativeBase = 0;
memory = program;
input.Clear();
output.Clear();
}
public void AddInput(params long[] values)
{
foreach (var v in values) AddInput(v);
}
public void AddInput(long value)
{
input.Enqueue(value);
}
private long MemGet(long addr)
{
return addr < memory.Length ? memory[addr] : 0;
}
private void MemSet(long addr, long value)
{
if (addr < 0) addr = 0;
if (addr >= memory.Length)
Array.Resize(ref memory, (int) addr + 1);
memory[addr] = value;
}
private long Mode(long idx)
{
var mode = MemGet(i) / 100;
for (var s = 1; s < idx; s++)
mode /= 10;
return mode % 10;
}
private long Get(long idx)
{
var param = MemGet(i + idx);
switch (Mode(idx))
{
case 0: return MemGet(param);
case 1: return param;
case 2: return MemGet(relativeBase + param);
default: throw new Exception("invalid parameter mode");
}
}
private void Set(long idx, long val)
{
var param = MemGet(i + idx);
switch (Mode(idx))
{
case 0:
MemSet(param, val);
break;
case 1: throw new Exception("cannot set in immediate mode");
case 2:
MemSet(relativeBase + param, val);
break;
default: throw new Exception("invalid parameter mode");
}
}
public HaltType Run(params long[] additionalInput)
{
foreach (var s in additionalInput) AddInput(s);
return Run();
}
public HaltType Run()
{
while (i < memory.Length)
{
var op = MemGet(i) % 100;
switch (op)
{
case 1:
Set(3, Get(1) + Get(2));
i += 4;
break;
case 2:
Set(3, Get(1) * Get(2));
i += 4;
break;
case 3:
if (!input.Any())
return HaltType.Waiting;
Set(1, input.Dequeue());
i += 2;
break;
case 4:
output.Enqueue(Get(1));
i += 2;
break;
case 5:
i = Get(1) == 0 ? i + 3 : Get(2);
break;
case 6:
i = Get(1) != 0 ? i + 3 : Get(2);
break;
case 7:
Set(3, Get(1) < Get(2) ? 1 : 0);
i += 4;
break;
case 8:
Set(3, Get(1) == Get(2) ? 1 : 0);
i += 4;
break;
case 9:
relativeBase += Get(1);
i += 2;
break;
case 99:
return HaltType.Terminate;
default:
throw new Exception($"unknown op {op} at {i}");
}
}
return HaltType.Terminate;
}
}
}