#include <iostream>
using namespace std;
int N, M; long long dp[5000009];
int main() {
	cin >> N >> M;
	dp[0] = 0; dp[1] = 1;
	for(int i = 2; i <= N; i++) dp[i] = (dp[i - 1] + dp[i - 2]) % M;
	cout << dp[N] << endl;
	return 0;
}