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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	int n,m; cin>>n>>m;
	int64_t cur=0,pre=1;
	for(int i=1;i<n;++i){
		int64_t tmp=cur;
		cur+=pre;
		pre=tmp;
	}
	cout<<cur%m<<"\n"s;
}