#include <bits/stdc++.h>

using namespace std;

int main() {
    //cin读入优化
    std::ios::sync_with_stdio(false);
    int a;
    cin >> a;
    if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0)) {
        cout << "Y" << endl;
    } else {
        cout << "N" << endl;
    }
    return 0;
}