#valid-parenthese
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A word is considered valid if: It contains a minimum of 3 characters. It contains only digits (0-9), and English letters (uppercase and...
A valid parentheses string is either empty "", "(" + A + ")", or A + B, where A and B are valid parentheses strings, and + represents string...
Given a string s containing only three types of characters: '(', ')' and '*', return true if s is valid. The following rules define a valid...
