#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define REP(i,n) for(int i=0,_n=(int)(n);i<_n;++i)
template<class T>bool chmin(T&a,const T&b){return a>b?(a=b,true):false;}
template<class T>bool chmax(T&a,const T&b){return a<b?(a=b,true):false;}

ll nextLong() {
  ll x; cin >> x; return x;
}

int main2() {
  ll N = nextLong();
  ll M = nextLong();

  ll a = 0;
  ll b = 1;
  REP(i, N-2) {
    ll c = (a + b) % M;
    a = b;
    b = c;
  }
  cout << b << endl;

  return 0;
}

int main() {
  for (;!cin.eof();cin>>ws) main2();
  return 0;
}