/****************************************************************** 题目: The order of a Tree(hdu 3999) 链接: http://acm.hdu.edu.cn/showproblem.php?pid=3999 题意: 给你一个序列建立一棵二叉搜索树 要你找出另外一个序 列,可以建立和原序列建立的二叉搜索树一样且这个序列 是字典序最小 算法: 二叉搜索树 思想: 对于一个二叉搜索树,它的先序遍历是能建立…
The order of a Tree Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 845 Accepted Submission(s): 461 Problem Description As we know,the shape of a binary search tree is greatly related to the…
Binary Tree Level Order Traversal Total Accepted: 79463 Total Submissions: 259292 Difficulty: Easy Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree {3,…
Problem Description As we know,the shape of a binary search tree is greatly related to the order of keys we insert. To be precisely: 1. insert a key k to a empty tree, then the tree become a tree with only one node; 2. insert a key k to a nonempty tr…
这里是杭电hdu上的链接:http://acm.hdu.edu.cn/showproblem.php?pid=3999 Problem Description: As we know,the shape of a binary search tree is greatly related to the order of keys we insert. To be precisely: 1. insert a key k to a empty tree, then the tree becom…
The order of a Tree Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 835 Accepted Submission(s): 453 Problem Description As we know,the shape of a binary search tree is greatly related to the…
http://acm.hdu.edu.cn/showproblem.php?pid=3999 The order of a Tree Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1361 Accepted Submission(s): 695 Problem Description As we know,the shape of…
The order of a Tree Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2070 Accepted Submission(s): 1097 Problem Description As we know,the shape of a binary search tree is greatly related to the ord…
The order of a Tree Problem Description As we know,the shape of a binary search tree is greatly related to the order of keys we insert. To be precisely:1. insert a key k to a empty tree, then the tree become a tree withonly one node;2. insert a key…
Binary Tree Level Order Traversal OJ: https://oj.leetcode.com/problems/binary-tree-level-order-traversal/ Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary…
Binary Tree Zigzag Level Order Traversal Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree {3,9,20,…
Title: Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree {3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,…
Binary Tree Level Order Traversal 题目链接 题目要求: Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree {3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level…
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its bottom-up level order t…
1. Unique Binary Search Trees Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 思路:和 Unique Binar…
建一个二叉搜索树,然后前序输出. 用链表建的,发现很久没做都快忘了... #include <cstdio> #include <cstdlib> struct Node{ int v; Node* l; Node* r; }; Node* root; Node* newnd(int value) { Node* u = (Node*) malloc(sizeof(Node)); if (u != NULL) { u -> v = value; u -> r = u -…
Process analysis Stack = 5, Push 3, Stack = 5, 3. Pre = 5 Current = 3, Pre = 5, Push 2 to the stack, stack = 5, 3, 2, Pre = 3 Current = 2, Pre = 3, pop 2, PRINT 2, Stack = 5, 3. Pre = 2 Current = 3, push 4, Stack = 5, 3 , 4. Pre = 3 Current = 4…
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example:Given binary tree {3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its bottom-up level order tr…
Given an n-ary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example, given a 3-ary tree: We should return its level order traversal: [ [1], [3,2,4], [5,6] ] Note: The depth of the tree is…
The 2-3 tree is also a search tree like the binary search tree, but this tree tries to solve the problem of the unbalanced tree. Imagine that you have a binary tree to store your data. The worst possible case for the binary tree is that all of the da…
There are two ways to conduct BFS on tree. Solution 1 -- Given level Use recursion to find given level, and print. /*Function to print level order traversal of tree*/ printLevelorder(tree) for d = 1 to height(tree) printGivenLevel(tree, d); /*Functio…
Given an n-ary tree, return the preorder traversal of its nodes' values. For example, given a 3-ary tree: Return its preorder traversal as: [1,3,5,6,2,4]. Note: Recursive solution is trivial, could you do it iteratively? 这道题让我们求N叉树的前序遍历,有之前那道Binary T…
source address:http://en.wikipedia.org/wiki/Red%E2%80%93black_tree A red–black tree is a type of self-balancing binary search tree, a data structure used in computer science. The self-balancing is provided by painting each node with one of two colors…
题目: Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom. For example:Given the following binary tree, 1 <--- / \ 2 3 <--- \ \ 5 4 <--- You should return [1,…
PAT甲级:1064 Complete Binary Search Tree (30分) 题干 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 with keys less than the node's key. The right subtre…
在层次查询中,如果想让"亲兄弟"按规矩进行升序排序就需要使用ORDER SIBLINGS BY 这个特定的排序语句,若要降序输出可以在其后添加DESC关键字. 通过这个实验给大家展示一下这个"亲兄弟"间的排序功能. 1.回望关系"树",这棵树中的B和C是亲兄弟,F和G是亲兄弟.注意,D和E不是亲兄弟,最多也就算是堂兄弟,"亲兄弟排序"功能对他们无效. A / \ B C / / D E / \ F G 2.上图对应的表数据 t…
1. Longest Palindromic Substring ( 最长回文子串 ) 2. Median of Two Sorted Arrays (两个排序数组的中位数) 3. Sqrt(x) 4. Single Number && Single Number (II) 5. Integer to Roman && Roman to Integer 6. 3Sum && 4Sum [ && K sum ] && 3Sum…
The order of a Tree Problem Description The shape of a binary search tree is greatly related to the order of keys we insert. To be precisely:1. insert a key k to a empty tree, then the tree become a tree with only one node;2. insert a key k to a no…
