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

ans = 0
for i in range(n):
    for j in range(i + 1, n):
        x1, y1 = A[i]
        x2, y2 = A[j]
        if x1 == x2:
            ans = max(ans, sum([1 for x, y in A if x == x1]))
            continue
        t = 0
        for x, y in A:
            if abs((y2 - y1) / (x2 - x1) * (x - x1) + y1 - y) < 0.0001:
                t += 1
        ans = max(ans, t)
print(ans)