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6dd3871a - Fix DPM single (#3413)

Fix DPM single (#3413) * Fix DPM single * add test * fix one more bug * Apply suggestions from code review Co-authored-by: StAlKeR7779 <stalkek7779@yandex.ru> --------- Co-authored-by: StAlKeR7779 <stalkek7779@yandex.ru>