#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main() {
  int N, M;
  scanf("%d %d", &N, &M);
  vector<int> F(N);
  F[0] = 0;
  F[1] = 1;
  for (int i = 2; i < N; ++i) {
    F[i] = F[i - 1] + F[i - 2];
    F[i] %= M;
  }
  printf("%d\n", F[N - 1]);
  return 0;
}