Friend Requests II: Who Has the Most Friends

Task: Write a solution to find the people who have the most friends and the most friends number.

Table: RequestAccepted

+--------------+------+
| Column Name  | Type |
+--------------+------+
| requester_id | INT  |
| accepter_id  | INT  |
| accept_date  | date |
+--------------+------+

Input: RequestAccepted table:

+--------------+-------------+-------------+
| requester_id | accepter_id | accept_date |
+--------------+-------------+-------------+
| 1            | 2           | 2016/06/03  |
| 1            | 3           | 2016/06/08  |
| 2            | 3           | 2016/06/08  |
| 3            | 4           | 2016/06/09  |
+--------------+-------------+-------------+

Output:

+----+-----+
| id | num |
+----+-----+
| 3  | 3   |
+----+-----+