题解

#include<iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n%4==0){  //四年一润.
        if(n%400==0) cout<<"Y";  //四百年再润.
        else if(n%100==0) cout<<"N";  //一百年不润.
        else cout<<"Y";
    }else cout<<"N";
    return 0;
}