#include<iostream.h>
#include<conio.h>
using namespace std;
int main() {
cin>> year;
if (year >100000)
{
cout<< "Invalid input"<<endl;
}
else if ((year % 400 == 0)) (year % 4 == 0 && year % 100 !=0)) {
cout  << "leap year:" << endl;
}
else {
cout<< "Not a leap year:" << endl;
}
return 0;
}