About This Pattern
Master the Greedy with Range pattern by practicing these problems organized by difficulty.Focus on the Key Signals - these are the indicators that tell you when to use this pattern.
Medium (1)
Valid Parenthesis String
Check if string with '(', ')', and '*' (can be '(', ')' or empty) is valid.
Key Signals:
Track min/max open count* gives three choicesCheck range validity