vlymar

  /** Checks whether the given year is a leap year.
   *  @return true if and only if the input year is a leap year.
   */
  public static boolean isLeapYear(int year) {
      if(year % 400 == 0) {
	  return true;
      } else if(year % 100 == 0) {
	  return false;
      } else if(year % 4 == 0) {
	  return true;