use proconio::input;

fn main() {
  input! {
    n: usize,
    m: usize,
  }
  let mut dp = vec![0; n];
  dp[0] = 0;
  dp[1] = 1;
  for i in 2..n {
    dp[i] = dp[i-1] + dp[i-2];
  }
  let ans = dp[n-1] % m;
  println!("{}", ans);
}