Consecutive Numbers

Task: Find all numbers that appear at least three times consecutively.

Table: Logs

+-------------+------+
| Column Name | Type |
+-------------+------+
| id          | INT  |
| num         | INT  |
+-------------+------+

Input: Logs table:

+----+-----+
| id | num |
+----+-----+
| 1  | 1   |
| 2  | 1   |
| 3  | 1   |
| 4  | 2   |
| 5  | 1   |
| 6  | 2   |
| 7  | 2   |
+----+-----+

Output:

+-----------------+
| ConsecutiveNums |
+-----------------+
| 1               |
+-----------------+