View Code of Problem 56

import java.util.Scanner;
 
 
public class Main 
{
    public static void main(String[] args) 
    {
        Scanner scan = new Scanner(System.in);
      int h1=scan.nextInt();
      int m1=scan.nextInt();
      int s1=scan.nextInt();
      int h2=scan.nextInt();
      int m2=scan.nextInt();
      int s2=scan.nextInt();
      int a=h1*3600+m1*60+s1;
      int b=h2*3600+m2*60+s2;
      int t=Math.abs(a-b);
      System.out.print(String.format("%d:%02d:%02d",t/3600,(t%3600)/60,(t%3600)%60));
      
      
    }
}