摘要:
题目:Given a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses substring.For"(()", the long... 阅读全文
摘要:
题目:Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the corre... 阅读全文