#include<iostream>
#include<algorithm>
#include<string>
#include<vector>
#include<queue>
#include<functional>
#include<cmath>
using namespace std;
long long dp[6000000], n, m;
int main() {
	cin >> n >> m;
	dp[1] = 0; dp[2] = 1;
	for (int i = 3; i < 5500000; i++)dp[i] = (dp[i - 1] + dp[i - 2]) % m;
	cout << dp[n] << endl;
	return 0;
}