[LeetCode] Palindrome Number 验证回文数字
Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the .....
[LeetCode] Validate Binary Search Tree 验证二叉搜索树
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's ke...
[LeetCode] Valid Sudoku 验证数独
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled ...
[LeetCode] Valid Parentheses 验证括号
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order,&...
[LeetCode] Valid Anagram 验证变位词
Given two strings s and t, write a function to determine if t is an anagram of s. For example,s = "anagram", t = "nagaram", return true.s = "rat",&nbs...
验证LeetCode Surrounded Regions 包围区域的DFS方法
在LeetCode中的Surrounded Regions 包围区域这道题中，我们发现用DFS方法中的最后一个条件必须是j > 1，如下面的红色字体所示，如果写成j > 0的话无法通过OJ，一直百思不得其解其中的原因，直到有网友告诉我说他验证了最后一个大集合在本地机子上可以通过，那么我也来验证看看吧。 class Solution { public: void solve(v...
[LeetCode] Valid Square 验证正方形
Given the coordinates of four points in 2D space, return whether the four points could construct a square. The coordinate (x,y) of a point is represented by an integer array with two integers. Exampl....
[LeetCode] Tag Validator 标签验证器
Given a string representing a code snippet, you need to implement a tag validator to parse the code and return whether it is valid. A code snippet is valid if all the following rules hold: The code .....
[LeetCode] Valid Parentheses 验证括号是否有效闭合
链接：https://leetcode.com/problems/valid-parentheses/#/description难度：Easy题目：20. Valid Parentheses Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input s....
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