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