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