#include <bits/stdc++.h>
using namespace std;

int main() {

  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  long long m;
  cin >> n >> m;
  vector<long long> dp(n,0);
  dp[1] = 1;
  for (int i=2;i<n;i++) {
    dp[i] = (dp[i-1]+dp[i-2])%m;
  }
  cout << dp[n-1] << endl;
}