// MyDate class.
// Fill in the parts that are marked "WRITE YOUR CODE HERE."

public class MyDate {

    /************** Data Members **********************/
    
    private int year;
    private int month;
    private int day;    
    private static int[] numDaysInMonth = 
                         {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

    
    /************** Constructors **********************/

    // Construct a MyDate instance from the input parameters year, month and day.
    // If year, month and day are not in the following valid ranges, 
    // an InvalidDateException will be thrown:
    //   year >= 1. 
    //   1 <= month <= 12.
    //   1 <= day <= X, where X is the number of days in that month.
    //
    // The InvalidDateException is thrown with the message "MyDate: Invalid date."
    
    public MyDate(int year, int month, int day) 
        
        // =======================
        // WRITE YOUR CODE HERE.
        // =======================
    }
    
    
    /**************** Helper Methods ***********************/
    
    // Return true iff year is a leap year.
    // A year is a leap year if it is divisible by 400, or
    // it is divisible by 4 but not by 100.

    private static boolean isLeapYear(int year) {
        if (year < 1) return false;
        return (year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0));
    }
  
    
    /**************** Accessors ***********************/
    
    public int getYear() {
        return year;
    }
    
    public int getMonth() {
        return month;
    }   
    
    public int getDay() {
        return day;
    }    
    
    
    /***************** Overriding Methods ******************/
    
    public String toString() {
        return year + "-" + month + "-" + day;
    }
}