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