[백준] 3009번 : 네 번째 점 - Java(자바)

https://www.acmicpc.net/problem/3009

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int x1=s.nextInt();
        int y1=s.nextInt();
        int x=0;
        int y=0;
        int cx=0;
        int cy=0;
        for(int i=0;i<2;i++){
            int x2=s.nextInt();
            int y2=s.nextInt();
            if(x1==x2) cx++;
            else x=x2;
            if(y1==y2) cy++;
            else y=y2;
        }
        System.out.format("%d %d",cx==1?x:x1,cy==1?y:y1);
    }
}