原题链接在这里:https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/ 题目: Return the root node of a binary search tree that matches the givenpreordertraversal. (Recall that a binary search tree is a binary tree where for everynode, any descendant ofnode.lefthas...
1.因为二叉搜索树的特性,将preorder数组排序,得到inorder。再将inorder的元素和下标用map存储起来,再对其进行递归。 2.利用二叉树的特性,初始化最小值,最大值,进行递归 3.用栈结构进行迭代。 classSolution {int[] preorder;intidx = 0; Map<Integer, Integer> map_inorder =newHashMap<>();publicTreeNode...
105. Construct Binary Tree from Preorder and Inorder Traversal——tree,程序员大本营,技术文章内容聚合第一站。
(Recall that a binary search tree is a binary tree where for everynode, any descendant ofnode.lefthas a value<node.val, and any descendant ofnode.righthas a value>node.val. Also recall that a preorder traversal displays the value of thenodefirst, then traversesnode.left, then traversesn...
Given preorder and inorder traversal of a tree, construct the binary tree. 本题就是根据前序遍历和中序遍历的结果还原一个二叉树。 题意很简答,就是递归实现,直接参考代码吧。 查询index部分可以使用Map做查询,建议和下一道题 leetcode 106. Construct Binary Tree from Inorder and Postorder Traversal 中...
/* To create a balanced binary search tree */ N*bt(intarr[],intfirst,intlast) { intmid; N*root=(N*)malloc(sizeof(N)); if(first>last) returnNULL; mid=(first+last)/2; root=new(arr[mid]); root->l=bt(arr,first,mid-1); ...
[LeetCode]*105.Construct Binary Tree from Preorder and Inorder Traversal 题目Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 思路 主要是根据前序遍历和中序遍历的特点解决这个题目。 1、确定树的根节点...
标签: Tree, Array, Depth-first Search 相关题目: (M) Construct Binary Tree from Preorder and Inorder Traversal *//* MARK: - 题目英文: Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. ...
Return the root node of a binary search tree that matches the givenpreordertraversal. (Recall that a binary search tree is a binary tree where for every node, any descendant ofnode.lefthas a value<node.val, and any descendant ofnode.righthas a value>node.val. Also recall that a preorde...
packageLeetCode_1008/*** 1008. Construct Binary Search Tree from Preorder Traversal *https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/description/* * Return the root node of a binary search tree that matches the given preorder traversal. ...