#include<iostream>
#include<string>
#include<cstring>

using namespace std;

int main(){

	long long N,M;
	long long a,b,c;

	cin>>N>>M;
	a=0,b=1,c=0;

	for(long long i=3;i<=N;i++){
		c=a+b;
		c=c%M;
		a=b%M;
		b=c%M;
	}

	cout<<b<<endl;
	
}