Add '2019/' from commit 'fc21396bc86bc0f706225f4f6e1d8294d344ca53'
git-subtree-dir: 2019 git-subtree-mainline:f1be11fca8git-subtree-split:fc21396bc8
This commit is contained in:
344
2019/07/src/main.zig
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344
2019/07/src/main.zig
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const std = @import("std");
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const intcode = @import("intcode");
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// TODO: it would be awesome if we could make this a comptime function
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const perm1 = [120][5]intcode.Word{
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.{ 0, 1, 2, 3, 4 },
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.{ 0, 1, 2, 4, 3 },
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.{ 0, 1, 3, 2, 4 },
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.{ 0, 1, 3, 4, 2 },
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.{ 0, 1, 4, 2, 3 },
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.{ 0, 1, 4, 3, 2 },
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.{ 0, 2, 1, 3, 4 },
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.{ 0, 2, 1, 4, 3 },
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.{ 0, 2, 3, 1, 4 },
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.{ 0, 2, 3, 4, 1 },
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.{ 0, 2, 4, 1, 3 },
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.{ 0, 2, 4, 3, 1 },
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.{ 0, 3, 1, 2, 4 },
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.{ 0, 3, 1, 4, 2 },
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.{ 0, 3, 2, 1, 4 },
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.{ 0, 3, 2, 4, 1 },
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.{ 0, 3, 4, 1, 2 },
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.{ 0, 3, 4, 2, 1 },
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.{ 0, 4, 1, 2, 3 },
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.{ 0, 4, 1, 3, 2 },
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.{ 0, 4, 2, 1, 3 },
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.{ 0, 4, 2, 3, 1 },
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.{ 0, 4, 3, 1, 2 },
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.{ 0, 4, 3, 2, 1 },
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.{ 1, 0, 2, 3, 4 },
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.{ 1, 0, 2, 4, 3 },
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.{ 1, 0, 3, 2, 4 },
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.{ 1, 0, 3, 4, 2 },
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.{ 1, 0, 4, 2, 3 },
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.{ 1, 0, 4, 3, 2 },
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.{ 1, 2, 0, 3, 4 },
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.{ 1, 2, 0, 4, 3 },
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.{ 1, 2, 3, 0, 4 },
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.{ 1, 2, 3, 4, 0 },
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.{ 1, 2, 4, 0, 3 },
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.{ 1, 2, 4, 3, 0 },
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.{ 1, 3, 0, 2, 4 },
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.{ 1, 3, 0, 4, 2 },
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.{ 1, 3, 2, 0, 4 },
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.{ 1, 3, 2, 4, 0 },
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.{ 1, 3, 4, 0, 2 },
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.{ 1, 3, 4, 2, 0 },
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.{ 1, 4, 0, 2, 3 },
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.{ 1, 4, 0, 3, 2 },
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.{ 1, 4, 2, 0, 3 },
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.{ 1, 4, 2, 3, 0 },
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.{ 1, 4, 3, 0, 2 },
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.{ 1, 4, 3, 2, 0 },
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.{ 2, 0, 1, 3, 4 },
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.{ 2, 0, 1, 4, 3 },
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.{ 2, 0, 3, 1, 4 },
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.{ 2, 0, 3, 4, 1 },
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.{ 2, 0, 4, 1, 3 },
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.{ 2, 0, 4, 3, 1 },
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.{ 2, 1, 0, 3, 4 },
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.{ 2, 1, 0, 4, 3 },
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.{ 2, 1, 3, 0, 4 },
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.{ 2, 1, 3, 4, 0 },
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.{ 2, 1, 4, 0, 3 },
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.{ 2, 1, 4, 3, 0 },
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.{ 2, 3, 0, 1, 4 },
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.{ 2, 3, 0, 4, 1 },
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.{ 2, 3, 1, 0, 4 },
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.{ 2, 3, 1, 4, 0 },
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.{ 2, 3, 4, 0, 1 },
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.{ 2, 3, 4, 1, 0 },
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.{ 2, 4, 0, 1, 3 },
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.{ 2, 4, 0, 3, 1 },
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.{ 2, 4, 1, 0, 3 },
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.{ 2, 4, 1, 3, 0 },
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.{ 2, 4, 3, 0, 1 },
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.{ 2, 4, 3, 1, 0 },
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.{ 3, 0, 1, 2, 4 },
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.{ 3, 0, 1, 4, 2 },
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.{ 3, 0, 2, 1, 4 },
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.{ 3, 0, 2, 4, 1 },
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.{ 3, 0, 4, 1, 2 },
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.{ 3, 0, 4, 2, 1 },
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.{ 3, 1, 0, 2, 4 },
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.{ 3, 1, 0, 4, 2 },
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.{ 3, 1, 2, 0, 4 },
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.{ 3, 1, 2, 4, 0 },
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.{ 3, 1, 4, 0, 2 },
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.{ 3, 1, 4, 2, 0 },
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.{ 3, 2, 0, 1, 4 },
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.{ 3, 2, 0, 4, 1 },
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.{ 3, 2, 1, 0, 4 },
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.{ 3, 2, 1, 4, 0 },
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.{ 3, 2, 4, 0, 1 },
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.{ 3, 2, 4, 1, 0 },
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.{ 3, 4, 0, 1, 2 },
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.{ 3, 4, 0, 2, 1 },
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.{ 3, 4, 1, 0, 2 },
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.{ 3, 4, 1, 2, 0 },
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.{ 3, 4, 2, 0, 1 },
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.{ 3, 4, 2, 1, 0 },
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.{ 4, 0, 1, 2, 3 },
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.{ 4, 0, 1, 3, 2 },
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.{ 4, 0, 2, 1, 3 },
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.{ 4, 0, 2, 3, 1 },
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.{ 4, 0, 3, 1, 2 },
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.{ 4, 0, 3, 2, 1 },
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.{ 4, 1, 0, 2, 3 },
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.{ 4, 1, 0, 3, 2 },
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.{ 4, 1, 2, 0, 3 },
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.{ 4, 1, 2, 3, 0 },
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.{ 4, 1, 3, 0, 2 },
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.{ 4, 1, 3, 2, 0 },
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.{ 4, 2, 0, 1, 3 },
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.{ 4, 2, 0, 3, 1 },
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.{ 4, 2, 1, 0, 3 },
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.{ 4, 2, 1, 3, 0 },
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.{ 4, 2, 3, 0, 1 },
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.{ 4, 2, 3, 1, 0 },
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.{ 4, 3, 0, 1, 2 },
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.{ 4, 3, 0, 2, 1 },
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.{ 4, 3, 1, 0, 2 },
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.{ 4, 3, 1, 2, 0 },
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.{ 4, 3, 2, 0, 1 },
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.{ 4, 3, 2, 1, 0 },
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};
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const perm2 = [120][5]intcode.Word{
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.{ 5, 6, 7, 8, 9 },
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.{ 5, 6, 7, 9, 8 },
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.{ 5, 6, 8, 7, 9 },
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.{ 5, 6, 8, 9, 7 },
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.{ 5, 6, 9, 7, 8 },
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.{ 5, 6, 9, 8, 7 },
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.{ 5, 7, 6, 8, 9 },
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.{ 5, 7, 6, 9, 8 },
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.{ 5, 7, 8, 6, 9 },
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.{ 5, 7, 8, 9, 6 },
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.{ 5, 7, 9, 6, 8 },
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.{ 5, 7, 9, 8, 6 },
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.{ 5, 8, 6, 7, 9 },
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.{ 5, 8, 6, 9, 7 },
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.{ 5, 8, 7, 6, 9 },
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.{ 5, 8, 7, 9, 6 },
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.{ 5, 8, 9, 6, 7 },
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.{ 5, 8, 9, 7, 6 },
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.{ 5, 9, 6, 7, 8 },
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.{ 5, 9, 6, 8, 7 },
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.{ 5, 9, 7, 6, 8 },
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.{ 5, 9, 7, 8, 6 },
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.{ 5, 9, 8, 6, 7 },
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.{ 5, 9, 8, 7, 6 },
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.{ 6, 5, 7, 8, 9 },
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.{ 6, 5, 7, 9, 8 },
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.{ 6, 5, 8, 7, 9 },
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.{ 6, 5, 8, 9, 7 },
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.{ 6, 5, 9, 7, 8 },
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.{ 6, 5, 9, 8, 7 },
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.{ 6, 7, 5, 8, 9 },
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.{ 6, 7, 5, 9, 8 },
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.{ 6, 7, 8, 5, 9 },
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.{ 6, 7, 8, 9, 5 },
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.{ 6, 7, 9, 5, 8 },
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.{ 6, 7, 9, 8, 5 },
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.{ 6, 8, 5, 7, 9 },
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.{ 6, 8, 5, 9, 7 },
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.{ 6, 8, 7, 5, 9 },
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.{ 6, 8, 7, 9, 5 },
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.{ 6, 8, 9, 5, 7 },
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.{ 6, 8, 9, 7, 5 },
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.{ 6, 9, 5, 7, 8 },
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.{ 6, 9, 5, 8, 7 },
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.{ 6, 9, 7, 5, 8 },
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.{ 6, 9, 7, 8, 5 },
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.{ 6, 9, 8, 5, 7 },
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.{ 6, 9, 8, 7, 5 },
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.{ 7, 5, 6, 8, 9 },
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.{ 7, 5, 6, 9, 8 },
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.{ 7, 5, 8, 6, 9 },
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.{ 7, 5, 8, 9, 6 },
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.{ 7, 5, 9, 6, 8 },
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.{ 7, 5, 9, 8, 6 },
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.{ 7, 6, 5, 8, 9 },
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.{ 7, 6, 5, 9, 8 },
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.{ 7, 6, 8, 5, 9 },
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.{ 7, 6, 8, 9, 5 },
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.{ 7, 6, 9, 5, 8 },
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.{ 7, 6, 9, 8, 5 },
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.{ 7, 8, 5, 6, 9 },
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.{ 7, 8, 5, 9, 6 },
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.{ 7, 8, 6, 5, 9 },
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.{ 7, 8, 6, 9, 5 },
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.{ 7, 8, 9, 5, 6 },
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.{ 7, 8, 9, 6, 5 },
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.{ 7, 9, 5, 6, 8 },
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.{ 7, 9, 5, 8, 6 },
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.{ 7, 9, 6, 5, 8 },
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.{ 7, 9, 6, 8, 5 },
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.{ 7, 9, 8, 5, 6 },
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.{ 7, 9, 8, 6, 5 },
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.{ 8, 5, 6, 7, 9 },
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.{ 8, 5, 6, 9, 7 },
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.{ 8, 5, 7, 6, 9 },
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.{ 8, 5, 7, 9, 6 },
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.{ 8, 5, 9, 6, 7 },
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.{ 8, 5, 9, 7, 6 },
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.{ 8, 6, 5, 7, 9 },
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.{ 8, 6, 5, 9, 7 },
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.{ 8, 6, 7, 5, 9 },
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.{ 8, 6, 7, 9, 5 },
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.{ 8, 6, 9, 5, 7 },
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.{ 8, 6, 9, 7, 5 },
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.{ 8, 7, 5, 6, 9 },
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.{ 8, 7, 5, 9, 6 },
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.{ 8, 7, 6, 5, 9 },
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.{ 8, 7, 6, 9, 5 },
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.{ 8, 7, 9, 5, 6 },
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.{ 8, 7, 9, 6, 5 },
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.{ 8, 9, 5, 6, 7 },
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.{ 8, 9, 5, 7, 6 },
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.{ 8, 9, 6, 5, 7 },
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.{ 8, 9, 6, 7, 5 },
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.{ 8, 9, 7, 5, 6 },
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.{ 8, 9, 7, 6, 5 },
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.{ 9, 5, 6, 7, 8 },
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.{ 9, 5, 6, 8, 7 },
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.{ 9, 5, 7, 6, 8 },
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.{ 9, 5, 7, 8, 6 },
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.{ 9, 5, 8, 6, 7 },
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.{ 9, 5, 8, 7, 6 },
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.{ 9, 6, 5, 7, 8 },
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.{ 9, 6, 5, 8, 7 },
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.{ 9, 6, 7, 5, 8 },
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.{ 9, 6, 7, 8, 5 },
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.{ 9, 6, 8, 5, 7 },
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.{ 9, 6, 8, 7, 5 },
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.{ 9, 7, 5, 6, 8 },
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.{ 9, 7, 5, 8, 6 },
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.{ 9, 7, 6, 5, 8 },
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.{ 9, 7, 6, 8, 5 },
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.{ 9, 7, 8, 5, 6 },
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.{ 9, 7, 8, 6, 5 },
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.{ 9, 8, 5, 6, 7 },
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.{ 9, 8, 5, 7, 6 },
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.{ 9, 8, 6, 5, 7 },
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.{ 9, 8, 6, 7, 5 },
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.{ 9, 8, 7, 5, 6 },
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.{ 9, 8, 7, 6, 5 },
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};
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fn doIt(m: *intcode.Machine) void {
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if (m.run()) {} else |err| {
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std.debug.warn("Machine {} failed to run successfully: {}\n", m.idx, err);
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}
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}
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fn run(program: []intcode.Word, machines: *[5]intcode.Machine, permutations: [120][5]intcode.Word) !intcode.Word {
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var max: intcode.Word = 0;
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for (permutations) |inputs| {
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// Reset program state each time
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for (machines) |*machine, i| {
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std.mem.copy(intcode.Word, machine.memory, program);
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machine.ip = 0;
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machine.idx = i;
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}
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// Phase inputs
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for (inputs) |input, i| {
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try machines[i].writeToInput(input);
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}
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// Provide starting value of 0
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try machines[0].writeToInput(0);
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// run the machines asychronously
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var f0 = try std.Thread.spawn(&machines[0], doIt);
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var f1 = try std.Thread.spawn(&machines[1], doIt);
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var f2 = try std.Thread.spawn(&machines[2], doIt);
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var f3 = try std.Thread.spawn(&machines[3], doIt);
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var f4 = try std.Thread.spawn(&machines[4], doIt);
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f0.wait();
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f1.wait();
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f2.wait();
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f3.wait();
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f4.wait();
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const final = try machines[4].readFromOutput();
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if (final > max)
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max = final;
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}
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return max;
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}
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pub fn main() anyerror!void {
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var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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defer arena.deinit();
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const alloc = &arena.allocator;
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var program = try intcode.loadFromStdIn(alloc);
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// 5 intcode computers act as the amps
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var machines: [5]intcode.Machine = undefined;
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// Allocate memory once only.
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for (machines) |*machine| {
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machine.alloc = alloc;
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machine.memory = try alloc.alloc(intcode.Word, program.len);
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}
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// Now wire up the machines correctly. The output of each machine should be
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// the input to the next.
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const pipes: [6]intcode.CharDev = .{
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try std.os.pipe(), try std.os.pipe(),
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try std.os.pipe(), try std.os.pipe(),
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try std.os.pipe(), try std.os.pipe(),
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};
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machines[0].input = pipes[0];
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machines[0].output = pipes[1];
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machines[1].input = machines[0].output;
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machines[1].output = pipes[2];
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machines[2].input = machines[1].output;
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machines[2].output = pipes[3];
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machines[3].input = machines[2].output;
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machines[3].output = pipes[4];
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machines[4].input = machines[3].output;
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machines[4].output = pipes[5];
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std.debug.warn("Day 7, Part 1: {}\n", try run(program, &machines, perm1));
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// In part 2, the machines need to be wired into a feedback loop.
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// To do this, drop pipe 6 and replace it with pipe 0
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machines[0].input = machines[4].output;
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std.debug.warn("Day 7, Part 2: {}\n", try run(program, &machines, perm2));
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}
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Reference in New Issue
Block a user