#include <bits/stdc++.h>
using namespace std;

int main() {
	int a;
	cin>>a;
if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0)) {

    cout << "Y" << endl;
} else {
    cout << "N" << endl;
}

	return 0;
}