/C01025 - Hình vuông nhỏ nhất

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>

int findMin(int* a, int* b, int* c, int* d) {
	int minV = *a;
	minV = (minV > *b) ? *b : minV;
	minV = (minV > *c) ? *c : minV;
	minV = (minV > *d) ? *d : minV;
	return minV;
}

int findMax(int* a, int* b, int* c, int* d) {
	int maxV = *a;
	maxV = (maxV < *b) ? *b : maxV;
	maxV = (maxV < *c) ? *c : maxV;
	maxV = (maxV < *d) ? *d : maxV;
	return maxV;
}

int main() {

	int x1, x2, y1, y2;
	int c1, c2, d1, d2;

	scanf("%d %d %d %d", &x1, &x2, &y1, &y2);
	scanf("%d %d %d %d", &c1, &c2, &d1, &d2);

	int minX = findMin(&x1, &y1, &c1, &d1);
	int maxX = findMax(&x1, &y1, &c1, &d1);
	int minY = findMin(&x2, &y2, &c2, &d2);
	int maxY = findMax(&x2, &y2, &c2, &d2);

	int res = (abs(maxX - minX) > abs(maxY - minY)) ? abs(maxX - minX) : abs(maxY - minY);

	printf("%d", res * res);
	return 0;
}