import sys
input = sys.stdin.readline
INF = 10 ** 18

N = int(input())
P = []
for _ in [0] * N:
	x, y = map(int, input().split())
	P.append((x + y, x - y))

max_x = max_y = -INF
min_x = min_y = INF
for x, y in P:
	if(max_x < x):
		max_x = x
	if(max_y < y):
		max_y = y
	if(min_x > x):
		min_x = x
	if(min_y > y):
		min_y = y

a = b = 0
for x, y in P:
	k = min(max(max_x - x, max_y - y), max(x - min_x, y - min_y))
	l = min(max(max_x - x, y - min_y), max(x - min_x, max_y - y))
	if(a < k):
		a = k
	if(b < l):
		b = l

ans = min(a, b) // 2
print(ans)