#include "bits/stdc++.h"

using namespace std;


static long long dp[5000000] = {0, 1};

static void solve()
{
  int n, m;
  cin >> n >> m;
  for(int i = 2; i < n; i++) {
    dp[i] = dp[i - 1] + dp[i - 2];
    dp[i] %= m;
  }
  cout << dp[n - 1] << "\n";
}

int main()
{
  ios::sync_with_stdio(false);
  cin.tie();
  solve();
}