#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int N,M;
  cin>>N>>M;
  vector<int> S(6000000);
  S[0] = 0;
  S[1] = 1;
  for(int i=2;i<S.size();i++){
      S[i] = S[i-1]+S[i-2];
      S[i] %= M;
  } 
  cout<<S[N-1]<<endl;
}