#Definition for a binary tree node.#class TreeNode(object):#def __init__(self, x):#self.val = x#self.left = None#self.right = None"""利用堆栈先进后出的特点"""classSolution(object):defpreorderTraversal(self, root):""":type root: TreeNode :rtype: List[int]"""result=[] slack=...
class Solution: def widthOfBinaryTree(self, root: Optional[TreeNode]) -> int: """ Epoch1-层序遍历-记录节点坐标 """ if root is None: return 0 levels = [[root, 1]] res = 0 while levels: temp, levels = levels, [] for i in range(len(temp)): node, pos = temp[i] if node....
TreeNode left; //左子树 TreeNode right; //右子树 TreeNode() { } TreeNode(int val) { this.val = val; } TreeNode(int val, TreeNode left, TreeNode right) { this.val = val; this.left = left; this.right = right; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13....
classSolution{public:vector<int>rightSideView(TreeNode* root){queue<TreeNode*> que;//创建数组保存各层遍历结果vector<int> res;//判断根节点是否为空,不为空加入根节点if(root !=NULL) que.push(root);//开始遍历,循环条件为队列是否为空while(!(que.empty())){//记录当前队列长度,即当前遍历层的节...
private void pushAllTheLeft(Stack<TreeNode> s, TreeNode root){ s.push(root); while(root.left!=null){ root = root.left; s.push(root); } } } Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes' values. ...
https://leetcode.com/problems/minimum-depth-of-binary-tree/ https://leetcode.com/problems/populating-next-right-pointers-in-each-node/ https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/ https://leetcode.com/problems/binary-tree-right-side-view/ ...
【LeetCode】199. Binary Tree Right Side View 解题报告(Python) 标签: LeetCode 题目地址:https://leetcode.com/problems/binary-tree-right-side-view/description/ 题目描述: Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered...
Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 代码语言:javascript 复制 1\2/3 return [1,2,3]. Note: Recursive solution is trivial, could you do it iteratively?
一. 树 1）求二叉树的高度（Maximum Depth of Binary Tree）// LeetCode, Maximum Depth of Binary ...
Binary Search308 Database303 Matrix254 Breadth-First Search243 Tree243 Bit Manipulation239 Two Pointers218 Prefix Sum201 Heap (Priority Queue)194 Simulation179 Binary Tree177 Stack168 Graph164 Counting160 Sliding Window150 Design130 Enumeration115 Backtracking108 Union Find88 Linked List81 Ordered Set71...