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 fibs: Vec<usize> = vec![];
    fibs.push(0);
    fibs.push(1 % m);
    for i in 2..n {
        fibs.push((fibs[i-2] + fibs[i-1]) % m);
    }
    
    println!("{}", fibs[n-1]);
}