Code Room
CodingEasy
Question
Given a list of integers and two indices i and j with 0 <= i <= j < length, reverse the section of the list from position i through position j inclusive, leaving everything outside that window untouched, and return the list. Do it with swaps rather than building a new list. Example: [1, 2, 3, 4, 5] with i = 1, j = 3 becomes [1, 4, 3, 2, 5].
Implement
reverse_section(nums: list[int], i: int, j: int) → list[int]Examples
in
[[1,2,3,4,5],1,3]out[1,4,3,2,5]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.
Learn the concepts
Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.
Run or narrate your approach, then ask the coach.