#include <iostream>
#define int long long
using namespace std;

int n, m;

signed main() {
	cin >> n >> m;
	
	int prev = 0, now = 1;
	for (int i = 3; i <= n; i++) {
		int nPrev = now;
		int nNow = prev + now;
		prev = nPrev;
		now = nNow;
		prev %= m;
		now %= m;
	}
	cout << now << endl;
	return 0;
}