leetcode anagrams string find
codility 和 leetcode 对比
根据网上的信息，codility 和 leetcode 都是用于评估编程技能的在线平台，它们都提供了不同难度和类型的编程挑战，支持多种编程语言，并可以用于招聘和面试的过程中。 不过，它们也有一些区别，比如： codility 更专注于工程团队的技能评估，它提供了 CodeCheck, CodeLiv ......
leetcode872叶相似树
这道题是考虑的深度优先搜索，使用递归 vecotr和queue入队操作并不相同： vector只能使用push_back(); queue既可以使用push()还可以使用push_back() void FindLeaf(TreeNode* root,vector<int>& v){ if(!roo ......
LeetCode 347. 前 K 个高频元素
# 快排思想 - 注意，这里是倒序排序，因此应该`while(nums[i].cnt>x);` ``` class Solution { public: struct element { int val,cnt; element(int a,int b) { val=a; cnt=b; } }; v ......
LeetCode -- 773. 滑动谜题
启发式搜索 class Solution { struct Node { string str; int x, y; int val; }; int n = 2, m = 3; string e = "123450"; int dx[4] = {-1, 0, 1, 0}; int dy[4] = { ......
安装 MySQL for Windows 时报错 The configuration for MySQL Server 8.0.34 has failed. You can find more information about the failures in the 'Log' tab. 解决方法
今天在安装 MySQL for Windows 时报错 ```txt The configuration for MySQL Server 8.0.34 has failed. You can find more information about the failures in the 'Log' ......
Java中String，StringBuilder， StringBuffer区别
### 1.可变性 String是不可变的字符序列：String类中使用字符数组保存字符串，因为有“final”修饰符，所以String是不可变的  pi(m); for (int i = 1, j = 0; i 0 && needle[i] != needle[j]) { j = pi[j - 1]; } if (needle[i] == nee ......
[LeetCode] 2408. Design SQL
You are given n tables represented with two arrays names and columns, where names[i] is the name of the ith table and columns[i] is the number of colu ......
leetcode-1518-easy
Water Bottles ``` There are numBottles water bottles that are initially full of water. You can exchange numExchange empty water bottles from the marke ......
String数组split方法常出现数组越界
String str = "a,b,c,,"; String[] ary = str.split(","); System.out.println(ary.length) ;// 结果是3而不是4 注意防止数组越界 ......
Raw String Literals
Raw string literals are string literals that can span multiple lines of code, they don’t require escaping of embedded double quotes, and escape sequen ......
Codility / LeetCode的重要性与注意事项
Codility / Leetcode 不只会针对回答内容给出最终分数，也会一并记录解题的过程供面试官参考; 相较于现场考试，Codility / Leetcode可以省下更多时间，也能让求职者在最熟悉的环境发挥实力。 进行测验前 先查看Codility / Leetcode FAQ，并完成demo ......
strings
strings 在对象文件或二进制文件中查找可打印的字符串 ## 补充说明 **strings命令** 在对象文件或二进制文件中查找可打印的字符串。字符串是4个或更多可打印字符的任意序列，以换行符或空字符结束。 strings命令对识别随机对象文件很有用。 ### 语法 ```shell strin ......
[LeetCode] 2268. Minimum Number of Keypresses
You have a keypad with 9 buttons, numbered from 1 to 9, each mapped to lowercase English letters. You can choose which characters each button is match ......
[LeetCode] 2323. Find Minimum Time to Finish All Jobs II
You are given two 0-indexed integer arrays jobs and workers of equal length, where jobs[i] is the amount of time needed to complete the ith job, and w ......
[LeetCode] 2330. Valid Palindrome IV
You are given a 0-indexed string s consisting of only lowercase English letters. In one operation, you can change any character of s to any other char ......
[LeetCode] 2340. Minimum Adjacent Swaps to Make a Valid Array
You are given a 0-indexed integer array nums. Swaps of adjacent elements are able to be performed on nums. A valid array meets the following condition ......
[LeetCode] 2422. Merge Operations to Turn Array Into a Palindrome
You are given an array nums consisting of positive integers. You can perform the following operation on the array any number of times: Choose any two ......
[LeetCode] 1676. Lowest Common Ancestor of a Binary Tree IV
Given the root of a binary tree and an array of TreeNode objects nodes, return the lowest common ancestor (LCA) of all the nodes in nodes. All the nod ......
LeetCode之0661, 二维向量初始化
img[i][j]周围的单元格，img[i+i1][j+j1], i1=-1,0,1, j1=-1,0,1, 每个都判断一次。O(9*m*n) class Solution { public: std::vector<std::vector<int>> imageSmoother( std::vec ......
Leetcode之0709, 修改字符串
1 class Solution { 2 public: 3 string toLowerCase(string s) { 4 for(char &ch: s){ 5 if(ch>='A' && ch<='Z'){ 6 ch=tolower(ch); 7 } 8 } 9 return s; 10 } ......
[LeetCode] 2486. Append Characters to String to Make Subsequence
You are given two strings s and t consisting of only lowercase English letters. Return the minimum number of characters that need to be appended to th ......
[刷题记录Day4]Leetcode链表专题
# No.1 ## 题目 [两两交换链表中的节点](https://leetcode.cn/problems/swap-nodes-in-pairs/) ## 思路 - 模拟类型题目 - 两个节点前后交换，同时记住原来的下一个节点 - 虚拟头节点 ## 代码 ```Java public ListN ......
LeetCode 1201. Ugly Number III 数学+二分答案
An ugly number is a positive integer that is divisible by $a$, $b$, or $c$. Given four integers $n$, $a$, $b$, and $c$, return the $n$th ugly number. ......
LeetCode 875. Koko Eating Bananas 二分答案
Koko loves to eat bananas. There are $n$ piles of bananas, the $i$th pile has $piles[i]$ bananas. The guards have gone and will come back in `h` hours ......
String
一、概述 二、创建方式 三、内存模型 栈和方法有关 堆和new（对象）有关 方法区存放的是class形式的文件 ps：JDK7以后有了一个StringTable（串池）专门在存储字符串； 例： 直接用双引号赋值优点： 效率高，节省内存（因为如果该字符串在串池中已经存在，就不会再创建新的字符串，而是进 ......
vue项目安装lees-loader报错：Module build failed: Error: Cannot find module 'less'
1-新搭建的一个项目，运行时报Module build failed: Error: Cannot find module 'less'错误 原因：vue文件里面的style添加了 lang="less" 解决方案： 安装less npm install less 2-安装less后运行报错： Mo ......
MSSQL STRING_SPLIT(把字符串拆分成集合)
语法： STRING_SPLIT(string , separator) 参数说明： string： 任何字符类型（例如 nvarchar、varchar、nchar 或 char）的表达式 separator： 任何字符类型（例如 nvarchar(1)、varchar(1)、nchar(1) 或 ......
「CF1831E」Hyperregular Bracket Strings 题解
本文网址：https://www.cnblogs.com/zsc985246/p/17565768.html ，转载请注明出处。 ## 前言 没见过的套路，写篇题解记录一下。 ## 题目大意 给定 $n$ 和 $k$ 个区间 $[l_i,r_i]$，你需要找出满足以下条件的**合法**括号序列个数： ......