Poj Solution 2301

http://poj.org/problem?id=2301

import java.util.Scanner;   
  
public class Main{   
  
    public static void main(String[] args) {   
        Scanner scan = new Scanner(System.in);   
        if (scan.hasNext()) {   
            int n = scan.nextInt();   
            for (int i = 0; i < n; i++) {   
                int s = scan.nextInt();   
                int d = scan.nextInt();   
                if (s < d ||(s+d)%2==1) {   
                    System.out.println("impossible");   
                } else {   
                    int a = (s + d) / 2;   
                    int b = (s - d) / 2;   
                    System.out.println(a + " " + b);   
                }   
            }   
        }   
  
    }   
}