[백준] 4299번 : AFC 윔블던 - Java(자바)

https://www.acmicpc.net/problem/4299

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int a=s.nextInt();
        int b=s.nextInt();
        if((a+b)%2==1||a<b) System.out.print(-1);
        else{
            int n=(a+b)/2;
            int m=a-n;
            System.out.format("%d %d",n,m);
        }
    }
}