Problem Description
You are given a sorted list of distinct integers ranging from 0 to 99.
For example:
[0, 1, 2, 50, 52, 75]
Your task is to produce a string that describes the numbers missing from the list.
In this example, the missing numbers are:
3–49, 51, 53–74, 76–99
Examples
Input: []
Output: "0-99"
Input: [0]
Output: "1-99"
Input: [1, 99]
Output: "0, 2-98"
Input: [3, 5]
Output: "0-2, 4, 6-99"
This problem asks you to scan a sorted list of integers and generate a compact string representing the missing ranges within a fixed boundary.
The solution requires careful handling of edge ranges, single missing values, and continuous intervals, all in a single linear pass.
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