[LeetCode]662. Maximum Width of Binary Tree 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/maximum-width-of-binary-tree/description/ 题目描述: Given a binary tree, write a function to get the maximum width of the given tree. The width…
题目如下: Given a binary tree, write a function to get the maximum width of the given tree. The width of a tree is the maximum width among all levels. The binary tree has the same structure as a full binary tree, but some nodes are null. The width of one…
Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 与Minimum Depth of Binary Tree对照看 解法一:递归,子树高度+1. /** * Defini…
Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. Solution: /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNo…
[LeetCode]297. Serialize and Deserialize Binary Tree 解题报告(Python) 标签: LeetCode 题目地址:https://leetcode.com/problems/serialize-and-deserialize-binary-tree/description/ 题目描述: Serialization is the process of converting a data structure or object into a se…
Given a binary tree, write a function to get the maximum width of the given tree. The width of a tree is the maximum width among all levels. The binary tree has the same structure as a full binary tree, but some nodes are null. The width of one level…
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Minimum Depth of Binary Tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 与Maximum Depth of Binary Tree对照看 解法一:深度优先遍历 借助栈进行深度优先遍历(DFS),…
Given a binary tree, write a function to get the maximum width of the given tree. The width of a tree is the maximum width among all levels. The binary tree has the same structure as a full binary tree, but some nodes are null. The width of one level…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 单调栈 日期 题目地址:https://leetcode.com/problems/maximum-width-ramp/ 题目描述 Given an array A of integers, a ramp is a tuple (i, j) for which i < j and A[i] <= A[j]. The width of such a…
题目如下: Given an array A of integers, a ramp is a tuple (i, j) for which i < j and A[i] <= A[j]. The width of such a ramp is j - i. Find the maximum width of a ramp in A. If one doesn't exist, return 0. Example 1: Input: [6,0,8,2,1,5] Output: 4 Expl…
［抄题］: Given a binary tree, write a function to get the maximum width of the given tree. The width of a tree is the maximum width among all levels. The binary tree has the same structure as a full binary tree, but some nodes are null. The width of one…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 递归 日期 题目地址:https://leetcode.com/problems/distribute-coins-in-binary-tree/ 题目描述 Given the root of a binary tree with N nodes, each node in the tree has node.val coins, and there…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:先序遍历 日期 题目地址:https://leetcode.com/problems/construct-string-from-binary-tree/description/ 题目描述 You need to construct a string consists of parenthesis and integers from a bi…
Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. Solution: 1.递归 /** * Definition for a binary tree node. * struct TreeNode { * int val; * T…
原题 Given a binary tree, collect a tree's nodes as if you were doing this: Collect and remove all leaves, repeat until the tree is empty. Example: Given binary tree 1 / 2 3 / 4 5 Returns [4, 5, 3], [2], [1]. Explanation: Removing the leaves [4, 5, 3]…
题目如下: Given the root of a binary tree with N nodes, each node in the tree has node.val coins, and there are Ncoins total. In one move, we may choose two adjacent nodes and move one coin from one node to another. (The move may be from parent to child…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 DFS 日期 题目地址:https://leetcode-cn.com/problems/find-leaves-of-binary-tree/ 题目描述 Given a binary tree, collect a tree's nodes as if you were doing this: Collect and remove all leave…
public int widthOfBinaryTree(TreeNode root) { /* 层序遍历+记录完全二叉树的坐标,左孩子2*i,右孩子2*i+1 而且要有两个变量,一个记录本层节点数,一个记录下层节点数 层序遍历用队列实现 还要有一个队列记录本层的下标 */ //层序遍历记录节点 Queue<TreeNode> tree = new LinkedList<>(); //记录每个节点的位置,用来判断此节点的孩子的坐标 Queue<Integer> inde…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 DFS BFS 日期 题目地址:https://leetcode.com/problems/maximum-depth-of-n-ary-tree/description/ 题目描述 Given a n-ary tree, find its maximum depth. The maximum depth is the number of nodes…
题目如下: We are given the root node of a maximum tree: a tree where every node has a value greater than any other value in its subtree. Just as in the previous problem, the given tree was constructed from an list A (root = Construct(A)) recursively with…
[LeetCode]895. Maximum Frequency Stack 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/maximum-frequency-stack/description/ 题目描述: Implement FreqStack, a class which simulates the operation of a…
[LeetCode]623. Add One Row to Tree 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/add-one-row-to-tree/description/ 题目描述: Given the root of a binary tree, then value v and depth d, you need to add a row of nodes with value v at the…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 BFS 日期 题目地址:https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree/ 题目描述 Given the root of a binary tree, the level of its root is 1, the level of its children is 2, a…
