Answer: Lyft OA Question 2024 June | Stack | on-campus

Solution: Valid Parentheses — Stack Matching Approach We use a Stack to track unmatched opening brackets. The logic is straightforward: If we see an opening bracket ((, {, [), push it onto the stack. If we see a closing bracket (), }, ]): If the stack is empty, there is no matching opener — return false. If the top of the stack does not match the current closing bracket — return false. Otherwise, pop the top of the stack (match ...