You are given a tree (a graph with n vertices and n - 1 edges in which it's possible to reach any vertex from any other vertex using only its edges). A vertex can be destroyed if this vertex has even degree. If you destroy a vertex, all edges connect…
B. Destruction of a Tree time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a tree (a graph with n vertices and n - 1 edges in which it's possible to reach any vertex from any ot…
B. Destruction of a Tree time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a tree (a graph with n vertices and n - 1 edges in which it's possible to reach any vertex from any ot…
leetcode算法: Find Bottom Left Tree ValueGiven a binary tree, find the leftmost value in the last row of the tree.Example 1:Input: 2 / \ 1 3Output:1Example 2: Input: 1 / \ 2 3 / / \ 4 5 6 / 7Output:7Note: You may assume the tree (i.e., the given root n…
题目:验证二叉搜索树 难度:Medium 题目内容: Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node co…
二叉搜索树是常用的概念,它的定义如下: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys greater than the node's key. Both the left and right subtrees must also be binary search…
题目来源 https://leetcode.com/problems/balanced-binary-tree/ Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never d…
