Hashmat_the_brave_warrior.java

import java.util.*;
public class main{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        while(input.hasNext()) {
        	long m = input.nextLong();
        	long n = input.nextLong();
        	System.out.println(Math.abs(m - n));
        }
    }
};