#include <iostream>
#include <math.h>

using namespace std;

long f[5000000];


int main(){
	int a;
	int n,m;
	int sum = 0;

	

	f[0] = 0;
	f[1] = 1;

	cin >> n  >> m;

	for(int i = 2; i < n;++i){
		sum += f[i - 2]+f[i - 1];
		f[i] = sum;
	}

	cout << sum % m <<endl;
	
}