#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

ll F[5000005];

int main(){
  ll N, M;
  cin >> N >> M;

  F[1] = 0;
  F[2] = 1;
  REP(i,3,N+1){
    F[i] = F[i-1] + F[i-2];
  }

  cout << F[N] % M << endl;
  return 0;
}