#include <bits/stdc++.h>
#define int long long
using namespace std;
const int MOD = 1000000007;
using Graph = vector<vector<int>>;

signed main() {
  int N, M;
  cin >> N >> M;
  
  int bef2 = 0;
  int bef = 1;
  int now = 0;
  for( int i = 2; i < N; i++ ){
    now = bef2 + bef;
    now %= M;
    bef2 = bef;
    bef = now;
    //cout << now << endl;
  }
  cout << now << endl;
}