Add: new

README.md

@@ -54,6 +54,7 @@ LeetCode Problems' Solutions
 
 | # | Title | Solution | Difficulty |
 | :-: | - | - | :-: |
+| <span id="1050">1050</span> | [Actors and Directors Who Cooperated At Least Three Times](https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times) 🔒 | [MySQL](https://github.com/openset/leetcode/tree/master/problems/actors-and-directors-who-cooperated-at-least-three-times) | Easy |
 | <span id="1049">1049</span> | [Last Stone Weight II](https://leetcode.com/problems/last-stone-weight-ii "最后一块石头的重量 II") | [Go](https://github.com/openset/leetcode/tree/master/problems/last-stone-weight-ii) | Medium |
 | <span id="1048">1048</span> | [Longest String Chain](https://leetcode.com/problems/longest-string-chain "最长字符串链") | [Go](https://github.com/openset/leetcode/tree/master/problems/longest-string-chain) | Medium |
 | <span id="1047">1047</span> | [Remove All Adjacent Duplicates In String](https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string "删除字符串中的所有相邻重复项") | [Go](https://github.com/openset/leetcode/tree/master/problems/remove-all-adjacent-duplicates-in-string) | Easy |

problems/actors-and-directors-who-cooperated-at-least-three-times/README.md

@@ -0,0 +1,14 @@
+<!--|This file generated by command(leetcode description); DO NOT EDIT.    |-->
+<!--+----------------------------------------------------------------------+-->
+<!--|@author    Openset <openset.wang@gmail.com>                           |-->
+<!--|@link      https://github.com/openset                                 |-->
+<!--|@home      https://github.com/openset/leetcode                        |-->
+<!--+----------------------------------------------------------------------+-->
+
+[< Previous](https://github.com/openset/leetcode/tree/master/problems/last-stone-weight-ii "Last Stone Weight II")
+
+Next >
+
+## 1050. Actors and Directors Who Cooperated At Least Three Times (Easy)
+
+

problems/actors-and-directors-who-cooperated-at-least-three-times/actors_and_directors_who_cooperated_at_least_three_times.sql

@@ -0,0 +1 @@
+# Write your MySQL query statement below

problems/actors-and-directors-who-cooperated-at-least-three-times/mysql_schemas.sql

@@ -0,0 +1,9 @@
+Create table If Not Exists ActorDirector (actor_id int, director_id int, timestamp int);
+Truncate table ActorDirector;
+insert into ActorDirector (actor_id, director_id, timestamp) values ('1', '1', '0');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('1', '1', '1');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('1', '1', '2');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('1', '2', '3');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('1', '2', '4');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('2', '1', '5');
+insert into ActorDirector (actor_id, director_id, timestamp) values ('2', '1', '6');

problems/last-stone-weight-ii/README.md

@@ -7,7 +7,7 @@
 
 [< Previous](https://github.com/openset/leetcode/tree/master/problems/longest-string-chain "Longest String Chain")
 
-Next >
+[Next >](https://github.com/openset/leetcode/tree/master/problems/actors-and-directors-who-cooperated-at-least-three-times "Actors and Directors Who Cooperated At Least Three Times")
 
 ## 1049. Last Stone Weight II (Medium)