n = int(input())
xy = [tuple(map(int, input().split())) for _ in range(n)]
ans = 0
for i in range(n):
    xi, yi = xy[i]
    for j in range(i + 1, n):
        xj, yj = xy[j]
        cnt = 0
        for k in range(n):
            xk, yk = xy[k]
            if yk * (xi - xj) == (yi - yj) * xk + (xi - xj) * yi - (yi - yj) * xi:
                cnt += 1

        ans = max(ans, cnt)

print(ans)