java 版本的如下所示,同儿茶搜索树迭代器实际上是一样的: 1publicclassSolution {2publicintkthSmallest(TreeNode root,intk) {3intres;4HashMap<TreeNode, Integer> map =newHashMap<TreeNode, Integer>();5Stack<TreeNode> stack =newStack<TreeNode>();6if(root ==null)7return0;8stack.push(root);9...
Difficulty: Medium Related Topics: Binary Search, Tree Link: https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Description Given a binary s
题目地址:https://leetcode.com/problems/kth-smallest-element-in-a-bst/#/description 题目描述 Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST’s total ...
publicclassSolution{privateTreeNodekthNode=null;privateintcount=0;publicintkthSmallest(TreeNoderoot,intk){if(root==null)return0;find(root,k);returnkthNode.val;}privatevoidfind(TreeNoderoot,intk){if(root.left!=null)find(root.left,k);count++;if(count==k){kthNode=root;return;}if(root.right!
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. 求一个二叉搜索树的第k小值。 题目链接:https://leetcode.com/problems/kth-smallest-element-in-a-bst/ 先来看下二叉搜索树的性质,对于任意一个非叶子节点,它的左子树中所有的值必定小于这个节点的val,...
Leetcode.230-Kth-Smallest-Element-In-A-Bst二叉搜索树中第K小的元素 使用中序遍历 /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { int i = 0; public ...
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题目描述: LeetCode 378. Kth Smallest Element in a Sorted Matrix Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted or
LeetCode Kth Smallest Element in a BST(数据结构),题意:寻找一棵BST中的第k小的数。思路:递归比较方便。1/**2*Definitionforabinarytreenode.3*structTreeNode{4*intval;5*TreeNode*left;6*...
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST’s total elements. Example 1: Input: roo...[LeetCode] 230. Kth Smallest Element in a BST 题目内容 https://leetcode-cn.com/pr...