* }*/classSolution {privateintcount = 0;privateintres = -1;publicintkthSmallest(TreeNode root,intk) { inorder(root, k);returnres; }privatevoidinorder(TreeNode root,intk) {if(root.left !=null) { inorder(root.left, k); }if(++count ==k) { res=root.val;return; }if(root.right ...
Given a binary search tree, write a functionkthSmallestto find the kth smallest element in it. Note: You may assume k is always valid, 1 ? k ? BST's total elements. Follow up: What if the BST is modified (insert/delete operations) often and you need to find the kth smallest frequen...
Leetcode 230 Kth Smallest Element in a BST 思路 由于bst的中序遍历可以得到一个升序的序列,因此对bst进行中序遍历并记录已经遍历过的数字,当遍历过count==k-1时(count初始为0),说明现在正在遍历的是第k小的数字,保存起来等到最后返回即可。 小技巧 需要注意的是在java的值传递方式,将count和result放到数组...
Kth Smallest Element in a BST @ python 一.题目: 给定一颗二叉查找树,找到其中第k小的元素并返回它的值. 二.解题思路: 我们可以按照中序遍历的递归框架去找到第k个元素,它肯定是第k小的元素. 代码如下:...leetcode 230. Kth Smallest Element in a BST Given a binary search tree, write a ...
Leetcode 230. Kth Smallest Element in a BST 简介: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,右子树中所有的值必定大于或等于当前节点的val。 这条性质就保证了如果我们对二叉搜索树做中序遍历,中序遍历的结果肯定是有序的。对于此题而言,我们只需要拿到...
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. (1 ≤ k ≤ BST’s total elements) Java Solution 1 – Inorder Traversal We can inorder traverse the tree and get the kth smallest element. Time is O(n). ...
题目链接:https://leetcode.com/problems/kth-smallest-element-in-a-bst/ 题目: kthSmallestto find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. Follow up: What if the BST is modified (insert/delete operations) often and you ...
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 ...
* [230] Kth Smallest Element in a BST *//** * Definition for a binary tree node. * function TreeNode(val) { * this.val = val; * this.left = this.right = null; * } *//** * @param {TreeNode} root * @param {number} k * @return {number} */var kthSmallest = func...
Right) } // 递归寻找第 k 小的结点 dfs(root) return ans } 题目链接: Kth Smallest Element in a BST : leetcode.com/problems/k 二叉搜索树中第K小的元素: leetcode-cn.com/problem LeetCode 日更第 93 天,感谢阅读至此的你 欢迎点赞、收藏鼓励支持小满...