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stack: 括号匹配 20 ：http://www.cnblogs.com/zle1992/p/8469603.html 最长括号匹配32 ：http://www.cnblogs.com/zle1992/p/8469694.html RPN逆波兰表达式 150 ：http://www.cnblog 阅读全文
摘要：
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. 阅读全文
摘要：
Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist 阅读全文