666

#include <iostream>
using namespace std;

bool is_leap(int y){
    if(y % 4 == 0 && y % 100 != 0 || y % 400 == 0){
        return true;
    }else{
        return false;
    }
}

int main() {

	int n;
	cin >> n;
	if(is_leap(n)) cout << "Y" << endl;
	else cout << "N" << endl;
    
   return 0;
}