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

ans = 0
for i, (xi, yi) in enumerate(xy):
    for j, (xj, yj) in enumerate(xy):
        if i == j:
            continue
        cnt = 2
        for k, (xk, yk) in enumerate(xy):
            if k == i or k == j:
                continue

            if (yi - yk) * (xj - xk) == (xi - xk) * (yj - yk):
                cnt += 1

        ans = max(ans, cnt)

print(ans)