46 lines
976 B
C#
46 lines
976 B
C#
namespace aoc2019;
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public sealed class Day19 : Day
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{
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private readonly long[,] grid;
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private readonly IntCodeVM vm;
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public Day19() : base(19, "Tractor Beam")
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{
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vm = new(Input.First());
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grid = new long[50, 50];
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}
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public override string Part1()
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{
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for (var x = 0; x < 50; x++)
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for (var y = 0; y < 50; y++)
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{
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vm.Reset();
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vm.Run(x, y);
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grid[x, y] = vm.Result;
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}
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return $"{grid.Cast<long>().Sum()}";
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}
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public override string Part2()
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{
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for (int x = 101, y = 0; ; x++)
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{
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while (true)
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{
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vm.Reset();
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vm.Run(x, y);
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if (vm.Result == 1) break;
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y++;
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}
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vm.Reset();
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vm.Run(x - 99, y + 99);
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if (vm.Result == 1)
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return $"{(x - 99) * 1e4 + y}";
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}
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}
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}
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