/** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ classSolution { public: boolisValidBST(TreeNode* root) { if(root==NULL)returntrue; returnisv(r...
1/**2* Definition for binary tree3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12voidgetTree(vector<int> &result, TreeNode *root) {13if(!root)return;14getTr...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode() : val(0), left(nullptr), right(nullptr) {} * TreeNode(int x) : val(x), left(nullptr), right(nullptr) {} * TreeNode(int x, TreeNode *left, TreeNode ...
package leetcode // 解法一 栈 func longestValidParentheses(s string) int { stack, res := []int{}, 0 stack = append(stack, -1) for i := 0; i < len(s); i++ { if s[i] == '(' { stack = append(stack, i) } else { stack = stack[:len(stack)-1] if len(stack) ==...
0208-implement-trie-prefix-tree.scala 0211-design-add-and-search-words-data-structure.scala 0213-house-robber-ii.scala 0215-kth-largest-element-in-an-array.scala 0217-contains-duplicate.scala 0230-kth-smallest-element-in-a-bst.scala 0235-lowest-common-ancestor-of-a-binary-search-tree.scala 0242...
My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言,一部分问题支持Java语言。近乎所有问题都会提供多个算
【不做有梦想的咸鱼】 LeetCode.1411. Number of Ways to Paint N × 3 Grid给 N x 3 网格图涂色的方案数 209 -- 8:51 App 【不做有梦想的咸鱼】 LeetCode. 124. Candy 分发糖果 149 -- 10:20 App LeetCode 105. Construct Binary Tree from Preorder and Inorder Traversal 从前序与中序遍历...
【leetcode】ValidParentheses Question : Given a string containing just the characters '(' , ')' , '{' , '}' , '[' and ']' , determine if the input string is valid. The brackets must close in the correct order, "()" and
Leetcode May Challenge - 05/14: Implement Trie (Prefix Tree)(Python) 题目描述 Implement a trie with insert, search, and startsWith methods. Note: You may assume that all inputs are consist of lowercase letters a-z. All inputs are guaranteed to be non-empty strings. 例子 Trie......
2. Note: You may assume the string contains only lowercase alphabets. Follow up: What if the inputs contain unicode characters? How would you adapt your solution to such case? packageleetcode.easy;publicclassValidAnagram{publicbooleanisAnagram1(Strings,Stringt){if(s.length()!=t.length()){re...