n = int(input())

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

ans = 0
for i in range(n):
    for j in range(i+1, n):
        x1, y1 = xy[i]
        x2, y2 = xy[j]
        if x1 == x2:
            ans = max(ans, len([None for x, y in xy if x == x1]))
            continue
        t = 0
        for k in range(n):
            x, y = xy[k]
            if abs((y2 - y1) / (x2 - x1) * (x - x1) + y1 - y) < 0.0001:
                t += 1
        ans = max(ans, t)

print(ans)