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;
    }

    const stepSize: u32 = 1;
    var n: u64 = 1;
    var found: u8 = 0;

    //Algorithm
    while(found != busTotal):(n+=stepSize){
        
        for(busses, 0..)|bus, offset|{
            //skip
            if(bus == 0){
                continue;
            }

            if(((n + offset) % bus) == 0){
                found +=1;
            }
        }

        if(found >= 7){
            std.debug.print("tick {d} has {d} aligned!\n",.{n, found});
        }

        if(found == busTotal){
            std.debug.print("Final tick {d}\n",.{n});
            break;
        }else{
            found = 0;
        }
    }
}

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

}