Question
Given a string expr (length 1..20) containing non-negative integers and the operators '+', '-', and '*', compute all possible results from grouping the numbers and operators with different parenthesizations. Return the distinct multiset of results sorted ascending (results may repeat for different groupings, and you should keep each occurrence). The input is a valid expression with single-digit or multi-digit operands.
diff_ways_to_compute(expr: str) → list[int]["2-1-1"]out[0,2]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.