Please solve the programming task below using a self-contained code snippet in a markdown code block.

A parentheses string is a non-empty string consisting only of '(' and ')'. It is valid if any of the following conditions is true:

It is ().
It can be written as AB (A concatenated with B), where A and B are valid parentheses strings.
It can be written as (A), where A is a valid parentheses string.

You are given a parentheses string s and a string locked, both of length n. locked is a binary string consisting only of '0's and '1's. For each index i of locked,

If locked[i] is '1', you cannot change s[i].
But if locked[i] is '0', you can change s[i] to either '(' or ')'.

Return true if you can make s a valid parentheses string. Otherwise, return false.
 
Please complete the following python code precisely:
```python
class Solution:
    def canBeValid(self, s: str, locked: str) -> bool:
```