应该基本都长这样吧

#include<iostream>
using namespace std;

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

int main() {

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