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