题解

#include <iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n%4==0){
        if(n%400==0) cout<<'Y'<<endl;
        else if(n%100==0) cout<<'N'<<endl;
        else cout<<'Y'<<endl;
    }else cout<<'N'<<endl;
    return 0;
}