2022/01/first.zig


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const std = @import("std");

const example = @embedFile("example");
const input = @embedFile("input");

pub fn main() anyerror!void {
    try std.testing.expectEqual(solve(example), 24000);
    const result = try solve(input);
    try std.io.getStdOut().writer().print("{}\n", .{result});
}

fn solve(puzzle: []const u8) !u64 {
    var it = std.mem.split(u8, puzzle, "\n");
    var max: u64 = 0;
    var tot: u64 = 0;
    while (it.next()) |value| {
        const n = std.fmt.parseInt(u64, value, 10) catch 0;
        if (n == 0) {
            if (tot > max) {
                max = tot;
            }
            tot = 0;
        } else {
            tot += n;
        }
    }
    return max;
}