28 lines
1,013 B
Zig
28 lines
1,013 B
Zig
const std = @import("std");
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const example = @embedFile("example");
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const example2 = @embedFile("example2");
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const example3 = @embedFile("example3");
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const example4 = @embedFile("example4");
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const example5 = @embedFile("example5");
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const input = @embedFile("input");
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pub fn main() anyerror!void {
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try std.testing.expectEqual(solve(example), 7);
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try std.testing.expectEqual(solve(example2), 5);
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try std.testing.expectEqual(solve(example3), 6);
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try std.testing.expectEqual(solve(example4), 10);
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try std.testing.expectEqual(solve(example5), 11);
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const result = solve(input);
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try std.io.getStdOut().writer().print("{}\n", .{result});
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}
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fn solve(puzzle: []const u8) u64 {
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var i: u64 = 3;
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while (true) : (i += 1) {
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if (puzzle[i] == puzzle[i - 1] or puzzle[i] == puzzle[i - 2] or puzzle[i] == puzzle[i - 3] or puzzle[i - 1] == puzzle[i - 2] or puzzle[i - 1] == puzzle[i - 3] or puzzle[i - 2] == puzzle[i - 3]) {
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continue;
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}
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return i + 1;
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}
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}
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