import sys
input = sys.stdin.readline

N = int(input())
P = [list(map(int, input().split())) for _ in [0] * N]

st = set([0])
dist = [[0] * N for i in range(N)]
route = [[] for _ in [0] * N]
for i in range(N - 1):
	for j in range(i + 1, N):
		dist[i][j] = dist[j][i] = abs(P[i][0] - P[j][0]) + abs(P[i][1] - P[j][1])
		route[i].append((j, dist[i][j]))
		route[j].append((i, dist[i][j]))
		st.add(dist[i][j])

def func(k):
	c = [0] * N
	for v in range(N):
		if(c[v]):
			continue
		c[v] = 1
		que = [v]
		while(que):
			now = que.pop()
			for nv, nd in route[now]:
				if(nd <= lis[k]):
					continue
				if(c[nv] == 0):
					c[nv] = -c[now]
					que.append(nv)
				elif(c[nv] == c[now]):
					return False
	return True

lis = sorted(st)[::-1]
ok = 0
ng = len(lis)
while(ng - ok > 1):
	k = (ok + ng) // 2
	if(func(k)):
		ok = k
	else:
		ng = k

ans = lis[ok] // 2
print(ans)