Self Optimization Initiative

C#

1. Two Sum

3. Longest Substring Without Repeating Characters

9. Palindrome Number

520. Detect Capital

999.Timeconvert

13. Roman to Integer

1768. Merge Strings Alternately

SQL

175. Combine Two Tables

176. Second Highest Salary

182. Duplicate Emails

183. Customers Who Never Order

196. Delete Duplicate Emails

197. Rising Temperature

584. Find Customer Referee

595. Big Countries

607. Sales Person

608. Tree Node

627. Swap Salary

1141. User Activity for the Past 30 Days I

1148. Article Views I

1393. Capital Gain/Loss

1484. Group Sold Products By The Date

1527. Patients With a Condition

1581. Customer Who Visited but Did Not Make Any Transactions

1667. Fix Names in a Table

1795. Rearrange Products Table

1873. Calculate Special Bonus

1965. Employees With Missing Information