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use std::io;

pub fn main() -> io::Result<()> {
    let mut inp = String::new();
    io::stdin().read_line(&mut inp)?;

    let ints: Vec<i64> = inp.trim().split_whitespace().map(|x| x.parse().unwrap()).collect();

    let [x,d,h,m] = ints[..] else {
        panic!("Did not get 4 integers on input");
    };

    let mut res = 0;
    res += (23 + x - d) * 24 * 60;
    res += (23 - h) * 60;
    res += 60 - m;
    if x == 5 {
        res += 24 * 60;
        if d < 29 || (d == 29 && h < 2) {
            res -= 60;
        }
    }
    println!("{res}");

    Ok(())
}