perf(contest): optimize contest problem grouping to single query #209
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in RandomSet Mode Replace N+1 queries per order with a single ordered query and linear grouping in Python. - Fetch all problems ordered by `order` in one query - Group problems into pro_sets in a single pass - Reduce database round-trips and improve performance
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in RandomSet Mode
Replace N+1 queries per order with a single ordered query and linear grouping in Python.
orderin one query