53 lines
1.2 KiB
Nix
53 lines
1.2 KiB
Nix
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{lib, input ? "", my-lib, ...}@pkgs: rec {
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inherit pkgs;
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inherit lib;
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inherit (builtins) elemAt genList elem concatStringsSep;
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inherit (lib) splitString;
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inherit (lib.strings) toIntBase10;
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init = input: input |> lib.trim
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|> splitString "\n"
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|> map (line: let c = splitString "," line; in {
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x = elemAt c 0 |> toIntBase10;
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y = elemAt c 1 |> toIntBase10;
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})
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;
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genChart = size: coords: genList (y: genList (x:
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if x == 0 && y == 0 then "S" else
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if x == size - 1 && y == size - 1 then "E" else
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if elem {inherit x y;} coords then "#" else "."
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) size) size;
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chartToStr = chart: chart |> (map (concatStringsSep "")) |> concatStringsSep "\n";
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mkSolution = {size, bytes, input}: rec {
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inherit size bytes input;
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walls = lib.sublist 0 bytes (init input);
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chart = genChart size walls;
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part1result = dijkstra.toGoal.steps;
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dijkstra = my-lib.dijkstra {
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pos = {x = 0; y = 0;};
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goal = {x = size - 1; y = size - 1;};
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chart = chart;
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width = size;
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height = size;
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};
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};
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example = mkSolution {
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size = 7;
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bytes = 12;
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input = lib.readFile ./example.txt;
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};
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real = mkSolution {
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size = 71;
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bytes = 1024;
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input = input;
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};
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# not 272, too high
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}
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