classSolution {public:boolfindTarget(TreeNode* root,intk) { unordered_set<int>st;returnhelper(root, k, st); }boolhelper(TreeNode* node,intk, unordered_set<int>&st) {if(!node)returnfalse;if(st.count(k - node->val))returntrue; st.insert(node->val);returnhelper(node->left, k, st...
[Leetcode] Binary tree--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 = 9 Output: Tr...
0167-two-sum-ii-input-array-is-sorted Time: 2 ms (93.21%), Space: 47.2 MB (36.24%) - LeetHub Dec 21, 2024 0173-binary-search-tree-iterator Time: 16 ms (99.76%), Space: 48.5 MB (11.72%) - LeetHub Dec 27, 2024 0202-happy-number Time: 0 ms (100%), Space: 40.6 MB (76.76...
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LeetCode 938. Range Sum of BST 2019-12-12 08:00 − 原题链接在这里:https://leetcode.com/problems/range-sum-of-bst/ 题目: Given the root node of a binary search tree, return the sum of values of all nod... Dylan_Java_NYC 0 482 fatal error: runtime: out of memory 2019...
LeetCode 938. Range Sum of BST 2019-12-12 08:00 −原题链接在这里:https://leetcode.com/problems/range-sum-of-bst/ 题目: Given the root node of a binary search tree, return the sum of values of all nod... Dylan_Java_NYC
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 = 9 Output: True Example 2: Input: 5 / \ 3 6 / \ \ 2 4 7 Targe...
【1043】Is It a Binary Search Tree (25 分),#include<iostream>#include<stdio.h>#include<stdlib.h>#include<math.h>#include<string.h>#include<algorithm>#include<map>#include<vector>#inclu...
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:
use std::rc::Rc;/**653. Two Sum IV - Input is a BSThttps://leetcode.com/problems/two-sum-iv-input-is-a-bst/Given the root of a Binary Search Tree and a target number k, return true if there exist two elements in the BST such that their sum is equal to the given target.*...