#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()
ll n,m;
vector<vector<ll>> prod(vector<vector<ll>> a,vector<vector<ll>> b){
	assert(a[0].size()==b.size());
	vector<vector<ll>> r(a.size(),vector<ll>(b[0].size()));
	for(ll i=0;i<a.size();i++){
		for(ll j=0;j<b[0].size();j++){
			for(ll k=0;k<a[0].size();k++)r[i][j]+=a[i][k]*b[k][j];
			r[i][j]%=m;
		}
	}
	return r;
}
int main(){
  cin.tie(0)->sync_with_stdio(0);
  cin>>n>>m;
  n--;
  vector<vector<ll>> a={{0,1},{1,1}},ans={{0},{1}};
  while(n>0){
  	if(n%2)ans=prod(a,ans);
  	a=prod(a,a);
  	n/=2;
  }
  cout<<ans[0][0]<<endl;
  char crlf;cin>>crlf;assert(cin.eof());
}