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 trees. Analysis: 给出一棵二叉树,判断它是否是二叉搜索树(BST)。 假设BST是这样定义的:它
LeetCode 98: Valid Binary Search Tree This answer is so awesome!! /*** Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * }*/classSolution { Integer min=null;publicbooleanisValidBST(Tre...
node differ in height by no more than 1.英文版地址 https://leetcode.com/problems/balanced-bina...
Can you solve this real interview question? Minimum Time to Complete Trips - You are given an array time where time[i] denotes the time taken by the ith bus to complete one trip. Each bus can make multiple trips successively; that is, the next trip can
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 trees. confused what"{1,#,2,3}"means?> read more on how binary tree is serialized on OJ. ...
aslowandhigh, trim the tree so that all its elements lies in[low, high]. Trimming the tree shouldnotchange the relative structure of the elements that will remain in the tree (i.e., any node's descendant should remain a descendant). It can be proven that there is aunique answer. ...
TreeDepth-first Search Hide Similar Problems (M) Path Sum II BFS Solution: publicList<String>binaryTreePaths(TreeNode root) { List<String> answer =newArrayList<String>();if(root !=null) searchBT(root, "", answer);returnanswer; }privatevoidsearchBT(TreeNode root, String path, List<String>...