#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <iomanip>
using namespace std;

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);

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