1#include <iostream>
2using namespace std;
3
4int main() {
5 int year;
6
7 cout << "Enter a year: ";
8 cin >> year;
9
10 if (year % 4 == 0) {
11 if (year % 100 == 0) {
12 if (year % 400 == 0)
13 cout << year << " is a leap year.";
14 else
15 cout << year << " is not a leap year.";
16 }
17 else
18 cout << year << " is a leap year.";
19 }
20 else
21 cout << year << " is not a leap year.";
22
23 return 0;
24}