The Valid Mountain Array Algorithm
Given an array A of integers, return true if and only if it is a valid mountain array. Recall that A is a mountain array if and only if: …
Author: ACMer
Recovery Models in SQL Server
When we talk stuff related to SQL Server and database, Recovery is an imperative objective that one shouldn’t underestimate. With Microsoft SQL Server, there are three different Recovery Models …
SQL Inner Join Tutorial with Example: Managers with at Least 5 Direct Reports
Given the following SQL Schema: Create table If Not Exists Employee (Id int, Name varchar(255), Department varchar(255), ManagerId int) Truncate table Employee insert into Employee (Id, Name, Department, ManagerId) …
The Algorithm to Construct the Rectangle Given Its Area
For a web developer, it is very important to know how to design a web page’s size. So, given a specific rectangular web page’s area, your job by now …
How to Find Positions of Large Groups using Two Pointer Algorithm?
In a string S of lowercase letters, these letters form consecutive groups of the same character. For example, a string like S = “abbxxxxzyy” has the groups “a”, “bb”, …