from collections import namedtuple
from fractions import gcd
P = namedtuple("P", "x y")

n = int(input())
ps = list()

for i in range(n):
    x, y = map(int, input().split())
    ps.append(P(x, y))

ps.sort()
dic = dict()

for i in range(n):
    for j in range(i + 1, n):
        x = ps[j].x - ps[i].x
        y = ps[j].y - ps[i].y
        x, y = x // gcd(x, y), y // gcd(x, y)
        if (i, x, y) not in dic:
            dic[(i, x, y)] = 2
        else:
            dic[(i, x, y)] += 1

ans = 0
for v in dic.values():
    ans = max(ans, v)

print(ans)