Create README - LeetHub

1050-actors-and-directors-who-cooperated-at-least-three-times/README.md

@@ -0,0 +1,45 @@
+<h2><a href="https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times/">1050. Actors and Directors Who Cooperated At Least Three Times</a></h2><h3>Easy</h3><hr><div class="sql-schema-wrapper__3VBi"><a class="sql-schema-link__3cEg">SQL Schema<svg viewBox="0 0 24 24" width="1em" height="1em" class="icon__1Md2"><path fill-rule="evenodd" d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg></a></div><div><p>Table: <code>ActorDirector</code></p>
+
+<pre>+-------------+---------+
+| Column Name | Type    |
++-------------+---------+
+| actor_id    | int     |
+| director_id | int     |
+| timestamp   | int     |
++-------------+---------+
+timestamp is the primary key (column with unique values) for this table.
+</pre>
+
+<p>&nbsp;</p>
+
+<p>Write a solution to find all the pairs <code>(actor_id, director_id)</code> where the actor has cooperated with the director at least three times.</p>
+
+<p>Return the result table in <strong>any order</strong>.</p>
+
+<p>The result format is in the following example.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre><strong>Input:</strong> 
+ActorDirector table:
++-------------+-------------+-------------+
+| actor_id    | director_id | timestamp   |
++-------------+-------------+-------------+
+| 1           | 1           | 0           |
+| 1           | 1           | 1           |
+| 1           | 1           | 2           |
+| 1           | 2           | 3           |
+| 1           | 2           | 4           |
+| 2           | 1           | 5           |
+| 2           | 1           | 6           |
++-------------+-------------+-------------+
+<strong>Output:</strong> 
++-------------+-------------+
+| actor_id    | director_id |
++-------------+-------------+
+| 1           | 1           |
++-------------+-------------+
+<strong>Explanation:</strong> The only pair is (1, 1) where they cooperated exactly 3 times.
+</pre>
+</div>