N = int(input())
L = [tuple(map(int, input().split())) for _ in range(N)]
res = 0
for i in range(N - 1):
    for j in range(i + 1, N):
        tmp = 2
        dx = L[i][0] - L[j][0]
        dy = L[i][1] - L[j][1]
        for k in range(N):
            if k == i or k == j:
                continue
            dx_k = L[i][0] - L[k][0]
            dy_k = L[i][1] - L[k][1]
            if dx * dy_k == dy * dx_k:
                tmp += 1
        res = max(tmp, res)
print(res)