AC

#include<iostream>
#include <algorithm>
#include <bits/stdc++.h>
#include <math.h>
#include <cmath>
#include<string>
#include<cstring>
#include<list>
#include<map>
#include<queue>
#include<iterator>
#include<stack>
using namespace std;
int main(){
int a;
cin>>a;
if(a%4 == 0 && a%100 != 0 || a%400 == 0){
cout<<"Y"<<endl;
}
else{
cout<<"N"<<endl;
}
return 0;
}