Compact the List

Problem Overview

• Given a sorted, duplicate-free integer list, compact consecutive numbers into range strings; if no ranges, return each number as a string.
• Input: N, then N space-separated integers (ascending). Output: line-separated strings representing the compacted list.
• Domain: data summarization and reporting where numeric ranges improve readability and storage.
• Cisco coding interview question; classic interview problem often used as an interview question.