easy

#include<bits/stdc++.h>
using namespace std;
int is_leap(int year){
    if(year%4 == 0 && year%100 != 0 || year%400 == 0){
        return true;
    }else{
       return false;
    }
}
int main(){
    int year;
    cin>>year;
    if(is_leap(year)==true)cout<<"Y"<<endl;
    else if(is_leap(year)==false)cout<<"N"<<endl;
    return 0;
}
//coder: Y38