#include<iostream>
void iaLeapYear(int year) {
    if (year <1 ||year >1000000000){
        std::cout<<"invalid input"<<endl;
    }
    else{
        if((year%4==0&&year%100!=0)||(year %400==0)){
            std::cout<<"Leap year"<<endl;
        }
        else{
            std::cout<<"Not a leap year"<<endl;
            
        }
    }
}
int main(){
    int year;
    cin>>year;
    isLeapYear(year);
    return 0;
}