Table: ActorDirector
+-------------+---------+ +| Column Name | Type | ++-------------+---------+ +| actor_id | int | +| director_id | int | +| timestamp | int | ++-------------+---------+ +timestamp is the primary key (column with unique values) for this table. ++ +
+ +
Write a solution to find all the pairs (actor_id, director_id) where the actor has cooperated with the director at least three times.
Return the result table in any order.
+ +The result format is in the following example.
+ ++
Example 1:
+ +Input: +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 | ++-------------+-------------+-------------+ +Output: ++-------------+-------------+ +| actor_id | director_id | ++-------------+-------------+ +| 1 | 1 | ++-------------+-------------+ +Explanation: The only pair is (1, 1) where they cooperated exactly 3 times. ++