const input = @embedFile("inputPart2.txt");
const std = @import("std");

pub fn main() !void {

    //Data wrangling
    var it = std.mem.tokenize(u8, input, "\n");
    var busses: [68]u32 = std.mem.zeroes([68:0]u32);
    var i: u32 = 0;

    while (it.next()) |line| : (i += 1) {
        busses[i] = readNum(line);
    }

    //count total active buslines
    var busTotal: u8 = 0;
    for (busses) |bus| {
        if (bus > 0)
            busTotal += 1;
    }

    var stepSize: u64 = 1;
    var n: u64 = 1;

    for (busses, 0..) |bus, offset| {
        //skip
        if (bus == 0) {
            continue;
        }

        while (((n + offset) % bus) != 0) : (n += stepSize) {}

        stepSize = stepSize * bus;
    }
    std.debug.print("tick: {d}", .{n});
}

fn readNum(line: []const u8) u32 {
    return std.fmt.parseInt(u32, line, 10) catch {
        return 0;
    };
}