from itertools import combinations

N = int(input())
XY = [list(map(int, input().split())) for i in range(N)]

cnt = 0
for P, Q in combinations(XY, 2):
    x1, y1 = P[0], P[1]
    x2, y2 = Q[0], Q[1]
    tmp = 0
    for x, y in XY:
        if (x1 - x) * (y1 - y2) == (x1 - x2) * (y1 - y):
            tmp += 1
    cnt = max(cnt, tmp)

print(cnt)