Can you solve this real interview question? Two Sum IV - Input is a BST - Given the root of a binary search tree and an integer k, return true if there exist two elements in the BST such that their sum is equal to k, or false otherwise. Example 1: [
leetcode 653 Two Sum IV - Input is a BST 详细解答 解法1 因为这个是二叉搜索树,可以想到先将二叉树进行中序遍历得到一个有序数组,然后然后双指针 (leetcode 167)来求解。 代码如下: 时间复杂度:O(N),空间复杂度:O(N) 解法2 这里借用set进行查询。用层序遍历依次查询。 时间复杂度:O(N), 空间复杂度...
leetcode 653. Two Sum IV - Input is a BST Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given target. Example 1: Input:5 / \ 3 6 / \ \ 2 4 7 Target = 9Output:True Example 2: Input:...
Two Sum的变种题,这次输入的是一个二叉树,还是用HashMap,然后遍历二叉树,用之前的方法找就行了。 还有一种方法是利用BST的性质,进行查找。 Java: This method also works for those who are not BSTs. The idea is to use a hashtable to save the values of the nodes in the BST. Each time when we...
Leetcode Golang 125. Valid Palindrome.go code遍历 版权声明:原创勿转 https://blog.csdn.net/anakinsun/article/details/88966101 anakinsun 2019/04/12 3780 Golang Leetcode 307. Range Sum Query - Mutable.go 编程算法 版权声明:原创勿转 https://blog.csdn.net/anakinsun/article/details/89055121 ...
leetcode 125. Valid Palindrome 344.Reverse String与对撞指针解法 浅谈“对撞指针法”这种通用解法以及应用于leetcode 125. Valid Palindrome 344.Reverse String,167.TwoSumII-Inputarrayissorted三道题。 leetcode 167[easy]---Two Sum II - Input array is sorted ...
1485-minimum-cost-to-make-at-least-one-valid-path-in-a-grid Time: 31 ms (26.64%), Space: 45.4 MB (34.31%) - LeetHub Jan 18, 2025 1502-construct-k-palindrome-strings Time: 4 ms (94.6%), Space: 45.5 MB (32.37%) - LeetHub Jan 11, 2025 ...
🐍 Shortest-LeetCode-Python-Solutions Leet Code 刷题笔记 - - 不求最快最省,但求最短最优雅 🌿,Shorter is better here. 前言 代码精炼是 Python 的核心,同时能够反应对于语言的熟练程度,本项目目的在于汇总 leet code 最短最优雅的解法,拒绝长篇大论,缩短学习周期,掌握各种技巧,助您在面试中写出令人眼前...
Here, we are going to learn about theimplementation of a coding problem where is my seat? This is competitive coding type problem.Submitted byDebasis Jana, on March 22, 2019 Problem statement: You and your friend are deciding to go for a tour by train. But before booking the ticket of ...
今天介绍的是LeetCode算法题中Easy级别的第148题(顺位题号是653)。给定二进制搜索树和目标数,如果BST中存在两个元素,使得它们的总和等于给定目标,则返回true。例如: 5 / \ 3 6 / \ \ 2 4 7 目标值:9 输出:true 5 / \ 3 6 / \ \ 2 4 7 ...