import itertools

N = int(input())

XY = []
for _ in range(N):
    x, y = map(int, input().split())
    XY += [[x, y]]

C = 0
for i, j in itertools.combinations(XY, 2):
    x1, y1 = i
    x2, y2 = j
    c = 0
    for x, y in XY:
        if (x2-x1)*(y-y1) == (y2-y1)*(x-x1):
            c += 1
    C = max(C, c)

print(C)