Kata

You are given three integer inputs: length, minimum, and maximum.

Return a string that:

1. Starts at minimum
2. Ascends one at a time until reaching the maximum, then
3. Descends one at a time until reaching the minimum
4. repeat until the string is the appropriate length

Examples:

 length: 5, minimum: 1, maximum: 3   ==>  "12321"
 length: 14, minimum: 0, maximum: 2  ==>  "01210121012101"
 length: 11, minimum: 5, maximum: 9  ==>  "56789876567"

Notes:

• length will always be non-negative
• negative numbers can appear for minimum and maximum values
• hyphens/dashes ("-") for negative numbers do count towards the length
• the resulting string must be truncated to the exact length provided
• return an empty string if maximum < minimum or length == 0
• minimum and maximum can equal one another and result in a single number repeated for the length of the string