#include <stdio.h>

main()
{
	int year;

	printf("Please type a year and press RETURN: ");
	scanf("%d", &year);

	if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) {
		printf("%d is a leap year.\n", year);
	} else {
		printf("%d is not a leap year.\n", year);
	}
}