Question
Implement an ordered multiset that processes a list of operations and answers range-count queries. Each op is one of: ['insert', x], ['remove', x] (removes one occurrence if present, else no-op), or ['count', lo, hi] which asks how many stored values v satisfy lo <= v <= hi (inclusive). Values are integers and duplicates are allowed. Return a list with one integer per 'count' op, in order. Assume up to ~10^5 ops.
ordered_range_counts(ops: list[list]) → list[int][[["insert",5],["insert",3],["insert",8],["count",3,8],["remove",5],["count",3,8],["count",1,2]]]out[3,2,0]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.
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.