Pattern

Matching / Parsing

3 problems in the roadmap use this pattern.

• Valid Parentheses Easy

  in Stack & Monotonic Stack

  Reported at: AmazonMetaMicrosoft+16
• Minimum Remove to Make Valid Parentheses Medium

  in Stack & Monotonic Stack

  Reported at: MetaAmazonMicrosoft+4
• Longest Valid Parentheses Hard

  in Stack & Monotonic Stack

  Reported at: AmazonMetaMicrosoft+4