#include <stdio.h>

main()
{
	int year;

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

	if (year % 400 == 0) {
		printf("%d is a leap year.\n", year);	/* e.g., 1600, 2000 */
	} else if (year % 100 == 0) {
		printf("%d is not a leap year.\n", year);	/* e.g., 1800, 1900 */
	} else if (year % 4 == 0) {
		printf("%d is a leap year.\n", year);
	} else {
		printf("%d is not a leap year.\n", year);
	}
}