import math;
N = input();
positions = []
for i in range(N):
pos = raw_input().split();
positions.append(pos);
x_max = 0;
y_max = 0;
j = 0;
while j < N - 1:
if x_max < abs(float(positions[j][0]) - float(positions[j + 1][0])):
x_max = abs(float(positions[j][0]) - float(positions[j + 1][0]));
if y_max < abs(float(positions[j][1]) - float(positions[j + 1][1])):
y_max = abs(float(positions[j][1]) - float(positions[j + 1][1]));
j = j + 1;
if not x_max:
area = y_max * y_max;
if not y_max:
area = x_max * x_max;
if x_max and y_max:
area = x_max * y_max;
print(area);
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