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