#include <iostream>
 int main(){
   long long int n,m;
   std::cin >> n >> m;
   int dp[n];
   dp[0] = 1;
   dp[1] = 1;
   for(int i = 2; i < n; i++) dp[i] = dp[i-1]+dp[i-2];
   std::cout << dp[n-1] % m << std::endl;
 }