J01025_HinhVuong.java

import java.util.*;
public class J01025_HinhVuong {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int []x = new int[4];
        int []y = new int[4];
        for(int i = 0;i<4;i++){
            x[i]=sc.nextInt();
            y[i]=sc.nextInt();
        }
        Arrays.sort(x);
        Arrays.sort(y);
        int c = Math.max(x[3]-x[0], y[3]-y[0]);
        System.out.println(c*c);
    }
}