AcWing 1671. 三角形

n = int(input())
a = [list(map(int, input().split())) for _ in range(n)] # 二维数组.jpg
ans = 0
for x1, y1 in a :
    for x2, y2 in a:
        for x3, y3 in a:
            if x1 != x2 and y1 == y2 and y1 != y3 and x1 == x3 :
                ans = max(ans, abs((x1 - x2) * (y1 - y3)))
                
print(ans)