#include<iostream>
using namespace std;
int main()
{
    int a;
    cin>>a;
    if(a<0)
    {
        cout<<"Invalid input";
        retrn 0;
    }
    if (a%400==0)
    {
        cout<<"Leap year";
    }
    else if(!a%100==0)
    {
        cout<<"Not a leap year";
    }
    else if (a%4==0)
    {
        cout<<"Leap year";
    }
        else
        {
            cout<<"Not a leap year";
        }
    return 0;
    
}