added valid_parentheses code#61
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Tejas-Santosh-Nalawade merged 1 commit intoOct 20, 2025
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Title: Implement Valid Parentheses Solution (LeetCode 20)
Description:
This pull request adds a C++ solution for the Valid Parentheses problem (LeetCode 20). The solution uses a stack-based approach to efficiently check whether a string containing only '(', ')', '{', '}', '[', ']' is valid.