#include <iostream>
using namespace std;
int main() {
int year;
cout << "Enter a year: ";
cin >> year;
// if year is divisible by 4 AND not divisible by 100
// OR if year is divisible by 400
// then it is a leap year
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
cout << year << " is a leap year.";
}
else {
cout << year << " is not a leap year.";
}
return 0;
}