#include <iostream>

using namespace std;


unsigned long int f1,f2;

main(){
	unsigned long int N,M;
	unsigned long int F,a;
	
	//�����ݒ�
	f1=0;f2=1;
	
	cin >> N >> M;
	for(int i=3;i<=N;i++){
		a=(f2%M)+(f1%M);
		f1=f2;
		f2=a;
	}
	F=f2%M;
	
	cout << F << endl;
	return 0;
}