right;6* public TreeNode(int val) {7* this.val = val;8* this.left = this.right = null;9* }10* }11*/12publicclassSolution {13/**14* @param root: a TreeNode, the root of the binary tree15* @return: nothing16* cnblogs.com/beiyeqingteng17*/18publicvoidflatten...
6 * public TreeNode(int val) { 7 * this.val = val; 8 * this.left = this.right = null; 9 * } 10 * } 11 */ 12 public class Solution { 13 /** 14 * @param root: a TreeNode, the root of the binary tree 15 * @return: nothing 16 * cnblogs.com/beiyeqingteng 17 */ 18 ...
//version 2: Divide & ConquerpublicclassSolution {/***@paramroot: a TreeNode, the root of the binary tree *@return: nothing*/publicvoidflatten(TreeNode root) { helper(root); }//flatten root and return the last nodeprivateTreeNode helper(TreeNode root) {if(root ==null) {returnnull; ...
要求:Given a binary tree, flatten it to a linked list in-place.将二叉树转化为平坦序列的树。比如: 结题思路: 该题有个提示,转化后的树的序列正好是二叉树前序遍历所得到的序列,所以,该题第一个思路就是利用前序遍历的方式来做。 第二个思路:我们可以利用递归的思路,先对根节点进行处理,将root的左子...
private TreeNode prev = null; public void flatten(TreeNode root) { if (root == null) return; flatten(root.right); flatten(root.left); root.right = prev; root.left = null; prev = root; } 代码# Go packageleetcode/** * Definition for a binary tree node. ...
Flip Binary Tree To Match Preorder Traversal Given a binary tree with N nodes, each node has a different value from {1, ..., N}. A node in this binary tree can be flipped by swapping the left child and the right child of... ...
Given a binary tree, flatten it to a linked list in-place. For example, Given 1 / \ 2 5 / \ \ 3 4 6 The flattened tree should look like: 1 \ 2 \ 3 \ 4 \ 5 \ 6 递归法 思路 相当于一次先序遍历, 将先访问的点存储在数组里, 下一个访问的节点为之前访问的点的右子树 ...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: void flatten(TreeNode* root) { ...
Flatten Binary Tree to Linked List 2019-12-21 22:15 − Description Flatten a binary tree to a fake "linked list" in pre-order traversal. Here we use the right pointer in TreeNode as the ... YuriFLAG 0 235 leetcode 341. Flatten Nested List Iterator 2019-12-23 23:02 − 本...
114. Flatten Binary Tree to Linked List Given a binary tree, flatten it to a linked listin-place. For example, given the following tree:1/\25/\ \346The flattened tree should look like:1\2\3\4\5\6 /** * Definition for a binary tree node. ...