N = int(input())
R = [list(map(int, input().split())) for i in range(N)]
ans = 0
for i in range(N):
    xi, yi = R[i]
    for j in range(i + 1, N):
        xj, yj = R[j]
        cnt = 2
        for k in range(j + 1, N):
            xk, yk = R[k]
            if (xk - xi) * (yj - yi) == (yk - yi) * (xj - xi):
                cnt += 1
        ans = max(ans, cnt)
print(ans)