#include "bits/stdc++.h"

using namespace std;


static long long dp[3] = {0, 1};

static void solve()
{
  int n, m;
  cin >> n >> m;
  for(int i = 2; i < n; i++) {
    dp[2] = dp[1] + dp[0];
    dp[2] %= m;
    dp[0] = dp[1];
    dp[1] = dp[2];
  }
  if (n <= 2) cout << dp[n - 1] % m << "\n";
  cout << dp[2] << "\n";
}

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