#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main(void) {
  ll n, m;
  cin >> n >> m;

  ll a = 0, b = 1, c;
  for (int i = 3; i <= n; i++) {
    c = (a + b) % m;
    a = b, b = c;
  }
  cout << c << endl;

  return 0;
}