InterviewDigestTechnical2026-08-16
valid parenthesis length with and without using stack
AI-Expanded — inferred from the question title, not from the original candidate report
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. Provide two separate implementations: one using a stack to track indices and another using a two-pass counter approach that operates in constant space.
Context & Summary
Interview Round 1 with questions on DSA, OS, and DBMS
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