1256. Encode Number

Given a non-negative integer num , Return its encoding string.

The encoding is done by converting the integer to a string using a secret function that you should deduce from the following table:

Example 1:

Input:

 num = 23
Output:

 "1000"

Example 2:

Input:

 num = 107
Output:

 "101100"

Constraints:

• 0 <= num <= 10^9