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

int main(void){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll n,m;
  cin >> n >> m;
  ll dp[10000000]={0};
  dp[0] = 0;
  dp[1] = 1;
  for(ll i=2;i<n;i++){
    dp[i] = dp[i-1]+dp[i-2];
    dp[i] %= m;
  }
  cout << dp[n-1]%m << endl;
  return 0;
}