#include <bits/stdc++.h>
using namespace std;
using ll=long long;
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
template<typename T>ostream&operator<<(ostream&os,const vector<T>&v){os<<endl;for(auto i:v)os<<i<<" ";return os;}
const ll inf=(1LL<<60);
#define all(a) (a).begin(),(a).end()
int main(){
  cin.tie(0)->sync_with_stdio(0);
  ll n,m;
  cin>>n>>m;
  ll a=0,b=1,c=1;
  for(ll i=0;i<n-3;i++){
  	swap(a,b);
  	swap(b,c);
  	c=(a+b)%m;
  }
  cout<<c<<endl;
  char crlf;cin>>crlf;assert(cin.eof());
}