UVA 10055 - Hashmat the Brave Warrior

package mypkg;
import java.util.Scanner;
 class Main {

    public static void main(String[] args) {
      Scanner in=new Scanner (System.in);
      while(in.hasNext())
      {
          long a=in.nextLong();
          long b=in.nextLong();
          if(a>b)
              System.out.println(a-b);
          else
              System.out.println(b-a);

      }
    }

}