Code RoomSummarize ranges
EasyPrep Room Coding #1523

Summarize ranges

CodingAlgorithms & data structuresEntry–Mid~14 min

Given a sorted list of distinct integers nums (ascending), return a list of strings summarizing the consecutive ranges. A run of consecutive integers a..b with a < b is written 'a->b'; a single integer a is written just as 'a'. For example [0,1,2,4,5,7] returns ['0->2','4->5','7']. The list may be empty (return []).

Implement
summarize_ranges(nums: list[int]) → list[str]
Examples
in[[0,1,2,4,5,7]]out["0->2","4->5","7"]
What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

0:00 of about 14 min
InputExpectedGot
[[0,1,2,4,5,7]]["0->2","4->5","7"]not run yetsample