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180. Consecutive Numbers

Medium


SQL Schema

Table: Logs

+ +
+-------------+---------+
+| Column Name | Type    |
++-------------+---------+
+| id          | int     |
+| num         | varchar |
++-------------+---------+
+In SQL, id is the primary key for this table.
+id is an autoincrement column starting from 1.
+
+ +

 

+ +

Find all numbers that appear at least three times consecutively.

+ +

Return the result table in any order.

+ +

The result format is in the following example.

+ +

 

+

Example 1:

+ +
Input: 
+Logs table:
++----+-----+
+| id | num |
++----+-----+
+| 1  | 1   |
+| 2  | 1   |
+| 3  | 1   |
+| 4  | 2   |
+| 5  | 1   |
+| 6  | 2   |
+| 7  | 2   |
++----+-----+
+Output: 
++-----------------+
+| ConsecutiveNums |
++-----------------+
+| 1               |
++-----------------+
+Explanation: 1 is the only number that appears consecutively for at least three times.
+
+
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