33 lines
811 B
C#
33 lines
811 B
C#
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Linq;
|
|
|
|
namespace aoc2019
|
|
{
|
|
public class Day1 : Day
|
|
{
|
|
public override int DayNumber => 1;
|
|
|
|
private static readonly IEnumerable<int> masses =
|
|
File.ReadLines("input/day1.in").Select(int.Parse);
|
|
|
|
private static int FuelCost(int weight) => 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() => $"{masses.Select(FuelCost).Sum()}";
|
|
|
|
public override string Part2() => $"{masses.Select(FullCost).Sum()}";
|
|
}
|
|
}
|