#include<iostream>
using namespace std; 
int main(){
    long long year;
    cin>>year;
    if(year < 1 || year > 1e9){
        cout<<"Invalid input"<<endl;
        return 0;
    }
    if((year % 400 ==0)|| (year % 4 ==0 && year % 100 1-0)){
        cout<<"Leap year"<<endl;
    }
    else{
        cout<<"Not a leap year"<<endl;
    }
    return 0;
}