//LeapYear.java


//import utils.SavitchIn;



class LeapYear
{
	public static void main(String[] agrs)
	{
		int year;
		System.out.print("\nEnter a year later than 1582 or -1 to quit: ");
		year = SavitchIn.readLineInt();

		while(year>0){
			if(year>1582){
				if(isLeapYear(year)==true){
					System.out.println(year + " is a leap year\n");
				}else{
					System.out.println(year + " is not a leap year\n");
				}
			}else{
				while(year<1582){
					System.out.print("\nYear must be later than 1582: ");
					year = SavitchIn.readLineInt();
					
				}
				if(isLeapYear(year)==true){
					System.out.println(year + " is a leap year\n");
				}else{
					System.out.println(year + " is not a leap year\n");
				}
			}
		System.out.print("\nEnter a year later than 1582 or -1 to quit: ");
		year = SavitchIn.readLineInt();
		}//end while
	}


	public static boolean isLeapYear(int year)
	{
		boolean isLeap;
		if(year%4 == 0){
			if(year%100 == 0){
				if(year%400 == 0){	
					isLeap = true;
				}else{
					isLeap = false;
				}
			}else{
				isLeap = true;
			}
		}else{
			isLeap = false;
		}
		return(isLeap);		
	}
}