#include<bits/stdc++.h>
#include<iostream>
#include<algorithm>
#include<vector>
#include<stdio.h>
#include<cstring>
#include<math.h>
#include<map>
#include<bitset>
#include<iomanip>
#include<queue>
#include<functional>
#include<stack>
#include<tuple>
#include<cassert>
using namespace std;

#define rep(i, n) for (long long i = 0; i < (long long)(n); ++i)
using P = pair<long long, long long>;

long long N, M;
long long a[5000001];


int main() {
  cin >> N >> M;
  a[1] = 0;
  a[2] = 1;
  rep(i, N) {
    a[i+3] = a[i+2] + a[i+1];
    a[i+3] %= M;
  }
  long long ans = a[N] % M;
  cout << ans << endl;
  return 0;
}