Solution: Remove Invalid Parentheses
Explore how to apply backtracking to remove the minimum invalid parentheses from a string, generating all valid combinations. Understand the method to balance parentheses, leverage recursion, and handle constraints to solve complex string validation problems effectively.
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Statement
You are given a string, s, that contains:
Lowercase English letters
Opening
'('and closing')'parentheses
A string is considered valid if:
All opening parentheses
'('are closed properly by a matching')'.The parentheses are in the correct order and nesting.
Letters can appear anywhere and do not affect validity.
Return all possible valid strings that can be formed by removing the minimum number of invalid parentheses. The answer must be a list of unique strings, in any order.
Constraints:
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