Given an array of unique integers, each integer is strictly greater than 1. We make a binary tree using these integers and each number may be used for any number of times. Each non-leaf node's value should be equal to the product of the values of it'…

823. 带因子的二叉树 给出一个含有不重复整数元素的数组,每个整数均大于 1. 我们用这些整数来构建二叉树,每个整数可以使用任意次数. 其中:每个非叶结点的值应等于它的两个子结点的值的乘积. 满足条件的二叉树一共有多少个?返回的结果应模除 10 ** 9 + 7. 示例 1: 输入: A = [2, 4] 输出: 3 解释: 我们可以得到这些二叉树: [2], [4], [4, 2, 2] 示例 2: 输入: A = [2, 4, 5, 10] 输出: 7 解释: 我们可以得到这些二叉树: […

Given an array of unique integers, each integer is strictly greater than 1. We make a binary tree using these integers and each number may be used for any number of times. Each non-leaf node's value should be equal to the product of the values of it'…

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 动态规划 相似题目 参考资料 日期 题目地址:https://leetcode.com/problems/binary-trees-with-factors/description/ 题目描述 Given an array of unique integers, each integer is strictly greater than 1. We…

题目如下: Given an array of unique integers, each integer is strictly greater than 1. We make a binary tree using these integers and each number may be used for any number of times. Each non-leaf node's value should be equal to the product of the values…

617. 合并二叉树 617. Merge Two Binary Trees 题目描述 给定两个二叉树,想象当你将它们中的一个覆盖到另一个上时,两个二叉树的一些节点便会重叠. 你需要将他们合并为一个新的二叉树.合并的规则是如果两个节点重叠,那么将他们的值相加作为节点合并后的新值,否则不为 NULL 的节点将直接作为新二叉树的节点. LeetCode617. Merge Two Binary Trees 示例 1: 输入: ``` Tree 1 Tree 2 1 2 / \ / \ 3 2 1 3…

Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are not. You need to merge them into a new binary tree. The merge rule is that if two nodes overlap, then…

https://leetcode.com/problems/flip-equivalent-binary-trees/ For a binary tree T, we can define a flip operation as follows: choose any node, and swap the left and right child subtrees. A binary tree X is flip equivalent to a binary tree Y if and only…

A full binary tree is a binary tree where each node has exactly 0 or 2 children. Return a list of all possible full binary trees with Nnodes.  Each element of the answer is the root node of one possible tree. Each node of each tree in the answer must…

Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are not. You need to merge them into a new binary tree. The merge rule is that if two nodes overlap, then…