Question
Given a list of closed integer intervals, return True if some interval completely contains another one at a different index: interval [a, b] contains [c, d] when a <= c and d <= b. Two identical intervals count as containing each other. The list holds at most a few thousand intervals, so a quadratic scan is acceptable. Example: [[1,6],[2,4],[7,9]] is True because [1,6] contains [2,4].
has_contained_interval(intervals: list[list[int]]) → bool[[[1,6],[2,4],[7,9]]]outtrueState 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.
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.