xiaocongcxc的博客

题目描述 Given a binary tree, find its minimum depth.The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 翻译(使用Google翻译)：给定二叉树，找到它的最小深度。最小深度是沿...

题目描述 Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are+,-,*,/. Each operand may be an integer or another expression. Some examples: 翻译(Google)：在反向波兰表示法中计算算...