sesehtneraPdilaV.20题目:https://leetcode.com/problems/valid-parentheses/知识点:栈的操作。版权声明:本文为ALANCHOI原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接和本声明。原文链接:https://blog.csdn.net/ALANCHOI/article/details/50538837