#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
#include<map>
#include<stack>
#include<queue>
using namespace std;


int main(void) {

  long long int n, m;
  cin >> n >> m;
  long long int f[3] = {0,1,1};
  for(int i=0; i<n-1; i++){
    f[2] = (f[1] + f[0]) % m;
    f[0] = f[1] % m;
    f[1] = f[2] % m;
  }
  cout << f[0] << endl;

  return 0;
}






// EOF