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Given inorder and level-order traversals of a Binary Tree, construct the Binary Tree. Following is an example to illustrate the problem. BinaryTree Input: Two arrays that represent Inorder and level order traversals of a Binary Treein[]    = {4, 8, 1…
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Boring counting Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 98304/98304 K (Java/Others) Total Submission(s): 2811    Accepted Submission(s): 827 Problem Description In this problem we consider a rooted tree with N vertices. The vertices a…
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半个下午,总算A过去了 毕竟水题 好歹是自己独立思考,debug,然后2A过的 我为人人的dp算法 题意: 为了支持你的观点,你需要从给的数据中找出尽量多的数据,说明老鼠越重速度越慢这一论点 本着“指针是程序员杀手”这一原则,我果断用pre来表示这只老鼠的直接前驱的序号 代码中我是按体重从大到小排序,然后找出一条最长的体重严格递减速度严格递增的“链”(其实找到的是链尾). 然后输出的时候从后往前输出 对结构体排序 对于样例来说,循环完以后应该是这样的: order 2 3 4 8 1 5 7 0…
题目链接: 题目 Ladies' Choice Time Limit: 6000MS Memory Limit: Unknown 64bit IO Format: %lld & %llu 问题描述 Teenagers from the local high school have asked you to help them with the organization of next year's Prom. The idea is to find a suitable date for eve…
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参考[LeetCode] questions conlusion_InOrder, PreOrder, PostOrder traversal 可以对binary tree进行遍历. 此处说明Divide and Conquer 的做法,其实跟recursive的做法很像,但是将结果存进array并且输出,最后conquer (这一步worst T:O(n)) 起来,所以时间复杂度可以从遍历O(n) -> O(n^2). 实际上代码是一样, 就是把[root.val] 放在先, 中, 后就是pr…
Recover Binary Search Tree Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could you devise a constant space solution? c…
Pre: node 先,                      Inorder:   node in,           Postorder:   node 最后 PreOrder Inorder PostOrder node-> left -> right left -> node ->right left -> right ->node Recursive method 实际上代码是一样, 就是把ans.append(root.val) 放在如上表先, 中,…