leetcode : valid binary search tree 不能通过 当元素中 有 val == INT_MAX 或者 val == INT_MIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 /** * Definition for a binary tree node. * struct TreeNode {...
LeetCode 98: Valid Binary Search Tree This answer is so awesome!! /*** Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * }*/classSolution { Integer min=null;publicbooleanisValidBST(Tre...
题目链接:Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree 题目大意:要求你去找到一条路径,要求这条路径上的值跟要求的arr数组长度和值都一样,并且这条路径是从根节点到叶子节点 题目思路:一个简单的dfs即可,我们可以知道,对于找到的路径,每个节点的层数就...
【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...
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
题目大意 解题方法 方法一:完全平方式性质 方法二:暴力求解 方法三:二分查找 方法四:牛顿法 日期 题目地址:https://leetcode.com/problems/valid-perfect-square/description/ 题目描述 Given a positive integer num, write a function which returns True if num is a perfect square else False. ...
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...
代码# Go packageleetcode// 解法一funcisAnagram(sstring,tstring)bool{alphabet:=make([]int,26)sBytes:=[]byte(s)tBytes:=[]byte(t)iflen(sBytes)!=len(tBytes){returnfalse}fori:=0;i<len(sBytes);i++{alphabet[sBytes[i]-'a']++}fori:=0;i<len(tBytes);i++{alphabet[tBytes[i]-'...
package leetcode func isNumber(s string) bool { numFlag, dotFlag, eFlag := false, false, false for i := 0; i < len(s); i++ { if '0' <= s[i] && s[i] <= '9' { numFlag = true } else if s[i] == '.' && !dotFlag && !eFlag { dotFlag = true } else if (s[...
【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