AC

#include <iostream>
using namespace std;
int main(){
	int Y;
	cin >> Y;
	if (Y%4==0 && Y%100!=0){
		cout << "Y" << endl;
		return 0;}
	if (Y%100==0 && Y%400==0){
		cout << "Y" << endl;
		return 0;}
	else{
		cout << "N" << endl;
		return 0;}
	return 0;
//说一句，&lt;在应该呈现出小于号的样子
}