#include<isostream>
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;
}