fn main() {
    let mut nm = String::new();
    std::io::stdin().read_line(&mut nm).ok();
    let nm: Vec<usize> = nm.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nm[0];
    let m = nm[1];

    let mut result = 1usize;
    let mut prev = 0usize;
    for _ in 3..=n {
        (prev, result) = (result, (prev + result) % m);
    }
    println!("{}", result);
}