const SERIAL: i64 = 9445;

fn main() {
    let res = (1..=298)
        .flat_map(|x| (1..=298).map(move |y| (x, y)))
        .max_by_key(|&(x, y)| {
            power_level(x, y)
                + power_level(x + 1, y)
                + power_level(x + 2, y)
                + power_level(x, y + 1)
                + power_level(x + 1, y + 1)
                + power_level(x + 2, y + 1)
                + power_level(x, y + 2)
                + power_level(x + 1, y + 2)
                + power_level(x + 2, y + 2)
        });

    println!("{:?}", res);
}

fn power_level(x: i64, y: i64) -> i64 {
    let rack_id = x + 10;
    (rack_id * y + SERIAL) * rack_id / 100 % 10 - 5
}