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Diffstat (limited to 'aoc/2021/06/part-two.zig')
-rw-r--r-- | aoc/2021/06/part-two.zig | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/aoc/2021/06/part-two.zig b/aoc/2021/06/part-two.zig new file mode 100644 index 0000000..72bf877 --- /dev/null +++ b/aoc/2021/06/part-two.zig @@ -0,0 +1,22 @@ +const parseUnsigned = std.fmt.parseUnsigned; +const print = std.debug.print; +const rotate = std.mem.rotate; +const std = @import("std"); +const tokenize = std.mem.tokenize; + +const input = @embedFile("input"); + +pub fn main() !void { + var timer = [_]usize{ 0 } ** 9; + defer print("{}\n", .{ @reduce(.Add, @as(@Vector(9, usize), timer)) }); + + var list = tokenize(input[0..input.len-1], ","); + while (list.next()) |i| + timer[try parseUnsigned(usize, i, 10)] += 1; + + var i: usize = 0; + while (i < 256) : (i += 1) { + rotate(usize, timer[0..], 1); + timer[6] += timer[8]; + } +} |