Update README.md

Author: qanhnn12

README.md

@@ -22,26 +22,26 @@ Solutions for all free SQL challenges on Leetcode executed on MySQL and MS SQL S
 | 14 | [584. Find Customer Referee](https://leetcode.com/problems/find-customer-referee/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/584.Find-Customer-Referee.sql) | 
 | 15 | [586. Customer Placing the Largest Number of Orders](https://leetcode.com/problems/customer-placing-the-largest-number-of-orders/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/586.Customer-Placing-the-Largest-Number-of-Orders.sql) | 
 | 16 | [595. Big Countries](https://leetcode.com/problems/big-countries/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/595.Big-Countries.sql) | 
-| 17 | [Classes More Than 5 Students](https://leetcode.com/problems/classes-more-than-5-students/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Classes-More-Than-5-Students.sql) | 
-| 18 | [Human Traffic of Stadium](https://leetcode.com/problems/human-traffic-of-stadium/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Human-Traffic-of-Stadium.sql) | 
-| 19 | [Sales Person](https://leetcode.com/problems/sales-person/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/tree/main) | 
-| 20 | [Tree Node](https://leetcode.com/problems/tree-node/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Tree-Node.sql) | 
-| 21 | [Not Boring Movies](https://leetcode.com/problems/not-boring-movies/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Not-Boring-Movies.sql) | 
-| 22 | [Exchange Seats](https://leetcode.com/problems/exchange-seats/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Exchanges-Seats.sql) | 
-| 23 | [Swap Salary](https://leetcode.com/problems/swap-salary/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Swap-Salary.sql) | 
-| 24 | [Actors and Directors Who Cooperated At Least Three Times](https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Actors-and-Directors-Who-Cooperated-At-Least-Three-Times.sql)|
-| 25 | [Sales Analysis III](https://leetcode.com/problems/sales-analysis-iii/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Sales-Analysis-III.sql) |
-| 26 | [Game Play Analysis I](https://leetcode.com/problems/game-play-analysis-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Game-Play-Analysis-I.sql) |
-| 27 | [User Activity for the Past 30 Days I](https://leetcode.com/problems/user-activity-for-the-past-30-days-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/User-Activity-for-the-Past-30-Days-I.sql) |
-| 28 | [Article Views I](https://leetcode.com/problems/article-views-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Article-Views-I.sql) |
-| 29 | [Market Analysis I](https://leetcode.com/problems/market-analysis-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Market-Analysis-I.sql) |
-| 30 | [Reformat Department Table](https://leetcode.com/problems/reformat-department-table/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Reformat-Department-Table.sql) |
-| 31 | [Capital Gain/Loss](https://leetcode.com/problems/capital-gainloss/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Capital-Gain-Loss.sql) |
-| 32 | [Top Travellers](https://leetcode.com/problems/top-travellers/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Top-Travellers.sql) |
-| 33 | [Group Sold Products By The Date](https://leetcode.com/problems/group-sold-products-by-the-date/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Group-Sold-Products-By-The-Date.sql) |
-| 34 | [Patients With a Condition](https://leetcode.com/problems/patients-with-a-condition/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Patients-With-a-Condition.sql) |
-| 35 | [Customer Who Visited but Did Not Make Any Transactions](https://leetcode.com/problems/customer-who-visited-but-did-not-make-any-transactions/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Customer-Who-Visited-but-Did-Not-Make-Any-Transactions.sql) |
-| 36 | [Bank Account Summary II](https://leetcode.com/problems/bank-account-summary-ii/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Bank-Account-Summary-II.sql) |
+| 17 | [596. Classes More Than 5 Students](https://leetcode.com/problems/classes-more-than-5-students/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/596.Classes-More-Than-5-Students.sql) | 
+| 18 | [601. Human Traffic of Stadium](https://leetcode.com/problems/human-traffic-of-stadium/) | [Link]([https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Human-Traffic-of-Stadium.sql](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Hard/601.Human-Traffic-of-Stadium.sql) | 
+| 19 | [607. Sales Person](https://leetcode.com/problems/sales-person/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/607.Sales-Person.sql) | 
+| 20 | [608. Tree Node](https://leetcode.com/problems/tree-node/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Medium/608.Tree-Node.sql) | 
+| 21 | [620. Not Boring Movies](https://leetcode.com/problems/not-boring-movies/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Not-Boring-Movies.sql) | 
+| 22 | [626. Exchange Seats](https://leetcode.com/problems/exchange-seats/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Medium/626.Exchanges-Seats.sql) | 
+| 23 | [627. Swap Salary](https://leetcode.com/problems/swap-salary/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/627.Swap-Salary.sql) | 
+| 24 | [1050. Actors and Directors Who Cooperated At Least Three Times](https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1050.Actors-and-Directors-Who-Cooperated-At-Least-Three-Times.sql)|
+| 25 | [1084. Sales Analysis III](https://leetcode.com/problems/sales-analysis-iii/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1084.Sales-Analysis-III.sql) |
+| 26 | [511. Game Play Analysis I](https://leetcode.com/problems/game-play-analysis-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/511.%20Game-Play-Analysis-I.sql) |
+| 27 | [1141. User Activity for the Past 30 Days I](https://leetcode.com/problems/user-activity-for-the-past-30-days-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/User-Activity-for-the-Past-30-Days-I.sql) |
+| 28 | [1148. Article Views I](https://leetcode.com/problems/article-views-i/) | [Link]([https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Article-Views-I.sql](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1148.Article-Views-I.sql)) |
+| 29 | [1158. Market Analysis I](https://leetcode.com/problems/market-analysis-i/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Medium/1158.Market-Analysis-I.sql) |
+| 30 | [1179. Reformat Department Table](https://leetcode.com/problems/reformat-department-table/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1179.Reformat-Department-Table.sql) |
+| 31 | [1393. Capital Gain/Loss](https://leetcode.com/problems/capital-gainloss/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Medium/1393.Capital-Gain-Loss.sql) |
+| 32 | [1407. Top Travellers](https://leetcode.com/problems/top-travellers/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1407.Top-Travellers.sql) |
+| 33 | [1484. Group Sold Products By The Date](https://leetcode.com/problems/group-sold-products-by-the-date/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1484.Group-Sold-Products-By-The-Date.sql) |
+| 34 | [1527. Patients With a Condition](https://leetcode.com/problems/patients-with-a-condition/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1527.Patients-With-a-Condition.sql) |
+| 35 | [1581. Customer Who Visited but Did Not Make Any Transactions](https://leetcode.com/problems/customer-who-visited-but-did-not-make-any-transactions/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1581.Customer-Who-Visited-but-Did-Not-Make-Any-Transactions.sql) |
+| 36 | [1587. Bank Account Summary II](https://leetcode.com/problems/bank-account-summary-ii/) | [Link](https://github.com/qanhnn12/SQL-Leetcode-Challenge-Solutions/blob/main/Easy/1587.Bank-Account-Summary-II.sql) |
 | 37 | [Fix Names in a Table](https://leetcode.com/problems/fix-names-in-a-table/) | [Link] |
 | 38 | [Daily Leads and Partners](https://leetcode.com/problems/daily-leads-and-partners/) | [Link] |
 | 39 | [Find Followers Count](https://leetcode.com/problems/find-followers-count/) | [Link] |