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A list of LeetCode database problems and solutions.
A growing list of LeetCode problems and solutions.
An object oriented design problem. Imagine you have a call center with three levels of employees, respondent, manager and director....
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LeetCode 1748. You are given an integer array nums. The...
LeetCode 1757. Write an SQL query to find the ids...
LeetCode 1747. Write an SQL query to find the account_id...
LeetCode 380. Implement a RandomizedSet class.
LeetCode 961. In a array A of size 2N, there...
LeetCode 349. Given two arrays, write a function to compute...
LeetCode 1213. Given three integer arrays arr1, arr2 and arr3...
LeetCode 1741. Write an SQL query to calculate the total...
LeetCode 771. You’re given strings jewels representing the types of...
LeetCode 1512. Given an array of integers nums. Return the...
LeetCode 1539. Given an array arr of positive integers sorted...
LeetCode 1731. Write an SQL query to report the ids...
LeetCode 1729. Write an SQL query that will, for each...
The INNER JOIN keyword selects records that have matching values...
Aliases are nicknames. They give us a shorthand way of...
LeetCode 1715. Write an SQL query to count the number...
