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With highways available, driving a car from Hangzhou to any other city is easy. But since the tank capacity of a car is limited, we have to find gas s 阅读全文
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A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文
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Given N integers, you are supposed to find the smallest positive integer that is NOT in the given list. Input Specification: Each input file contains 阅读全文
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1.后序+中序=》前序 转自：https://www.liuchuo.net/archives/2090 假设： 已知后序与中序输出前序（先序）：后序：3, 4, 2, 6, 5, 1（左右根）中序：3, 2, 4, 1, 6, 5（左根右） //需要多加复习。 2.前序+中序=》后序 转自：htt 阅读全文