#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import numpy as np
from scipy.sparse.csgraph import connected_components

# %%
N = int(readline())
XY = np.array(read().split(), np.int64)
X = XY[::2]
Y = XY[1::2]

# %%
dx = X[:, None] - X[None, :]
dy = Y[:, None] - Y[None, :]
dist_mat = dx**2 + dy**2

# %%


def test(x):
    graph = dist_mat <= x * x
    _, comp = connected_components(graph, directed=False)
    return comp[0] == comp[-1]


# %%
left = 0
right = 10 ** 9 * 2
while left + 1 < right:
    x = (left + right) // 2
    if test(x):
        right = x
    else:
        left = x

answer = right + (-right) % 10
print(answer)