import cs1.Keyboard;
public class leapyear
{
   public static void main (String[] args)
   {
      int year;
      String redo = new String ("y");
      System.out.println ("Justin's Leap year Finder");
      while (redo.equalsIgnoreCase("y"))
	{
        System.out.print ("Please Enter a year: ");
	year = Keyboard.readInt();
	if (year >= 1582)
           {
	   if (year <= 9999)
	      {	
	      if (year % 4 == 0)
	         {
		 if (year % 100 != 0)			
		    System.out.println (year + " is a Leap Year!!!");
		 else
		    if (year % 400 == 0)
		       System.out.println (year + " is a Leap Year!!!");
		    else 
		       System.out.println (year + " is not a Leap year.");
		  }
	       else
	          System.out.println(year + " is not a leap Year.");
	       }
	    else
		System.out.println ("Not in your lifetime!");
	    }
	else
	   System.out.println ("That was before leap years were invented...");

	System.out.print ("Enter another year? y/n: ");
	redo = Keyboard.readString();

      }		
   }
}