#include<iostream>
using namespace std;
int main(){
int y;
cin>>y;
if(y % 4 == 0){
if(y % 100 == 0){
if(y % 400 == 0){
cout<<y<<" is a leap year";
}
else
cout<<y<<" is not a leap year";
}
else
cout<<y<<" is a leap year";
}
else
cout<<y<<" is not a leap year";
}
