use std::{
    collections::{BTreeSet, HashMap},
    hash::Hash,
};

fn main() {
    proconio::input! {
        n: usize,
        m: u32,
    }
    let mut fib = vec![0, 1];
    for _ in 0..n - 2 {
        fib.push((fib[fib.len() - 1] + fib[fib.len() - 2]) % m);
    }
    //eprintln!("{fib:?}");
    println!("{}", fib[fib.len() - 1]);
}