| #4701 | Decimal SequencesTsukuba Regional 2015 | |
| #4702 | Squeeze the CylindersTsukuba Regional 2015 | |
| #4703 | Sibling RivalryTsukuba Regional 2015 | |
| #4704 | Wall ClocksTsukuba Regional 2015 | |
| #4705 | Bringing Order to DisorderTsukuba Regional 2015 | |
| #4706 | Deadlock DetectionTsukuba Regional 2015 | |
| #4707 | Do Geese See God?Tsukuba Regional 2015 | |
| #4708 | Rotating Cutter BitsTsukuba Regional 2015 | |
| #4709 | Routing a Marathon RaceTsukuba Regional 2015 | |
| #4710 | Post Office InvestigationTsukuba Regional 2015 | |
| #4711 | Min-Max Distance GameTsukuba Regional 2015 | |
| #4712 | MonstersinfO(1) Cup 2017 National Round | |
| #4713 | DNAinfO(1) Cup 2017 National RoundOutput Only | |
| #4714 | PromotioninfO(1) Cup 2017 National Round | |
| #4715 | ComebackinfO(1) Cup 2017 National Round | |
| #4716 | WalkinfO(1) Cup 2017 National Round | |
| #4717 | Easter EggsinfO(1) Cup 2017 International RoundInteractive | |
| #4718 | XOR SuminfO(1) Cup 2017 International Round | |
| #4719 | Binary SubsequencesinfO(1) Cup 2017 International Round | |
| #4720 | Permutation RecoveryinfO(1) Cup 2017 International Round | |
| #4721 | PalindromesinfO(1) Cup 2018 National Round | |
| #4722 | NorelainfO(1) Cup 2018 National Round | |
| #4723 | ShellinfO(1) Cup 2018 National Round | |
| #4724 | The gradeinfO(1) Cup 2018 National Round | |
| #4725 | CambridgeinfO(1) Cup 2018 National Round | |
| #4726 | MaxCompinfO(1) Cup 2018 International Round | |
| #4727 | DEL13infO(1) Cup 2018 International Round | |
| #4728 | Hidden SequenceinfO(1) Cup 2018 International RoundInteractive | |
| #4729 | Balanced TreeinfO(1) Cup 2018 International Round | |
| #4730 | SplitinfO(1) Cup 2019 National Round | |
| #4731 | TreasureinfO(1) Cup 2019 National Round | |
| #4732 | MeaninfO(1) Cup 2019 National Round | |
| #4733 | SimpleinfO(1) Cup 2019 National Round | |
| #4734 | SubwayinfO(1) Cup 2019 National Round | |
| #4735 | ConsulinfO(1) Cup 2019 International RoundInteractive | |
| #4736 | CostinlandinfO(1) Cup 2019 International Round | |
| #4737 | CatinfO(1) Cup 2019 International Round | |
| #4738 | MouseinfO(1) Cup 2019 International RoundInteractive | |
| #4739 | PionekXXV Olimpiada Informatyczna - I etap | |
| #4740 | Plan metraXXV Olimpiada Informatyczna - I etap | |
| #4741 | PowódźXXV Olimpiada Informatyczna - I etap | |
| #4742 | PrawnicyXXV Olimpiada Informatyczna - I etap | |
| #4743 | RóżnorodnośćXXV Olimpiada Informatyczna - I etap | |
| #4744 | CheerleaderinfO(1) Cup 2020 | |
| #4745 | FootballinfO(1) Cup 2020 | |
| #4746 | Table TennisinfO(1) Cup 2020 | |
| #4747 | TrampolineinfO(1) Cup 2020 | |
| #4758 | Captivating processXXII Open All-Siberian Programming Contest named after I.V. Pottosin Final tour | |
| #4759 | ArtworkNCPC 2016 | |
| #4760 | Bless You Autocorrect!NCPC 2016 | |
| #4761 | Card Hand SortingNCPC 2016 | |
| #4762 | Daydreaming StockbrokerNCPC 2016 | |
| #4763 | ExponialNCPC 2016 | |
| #4764 | Fleecing the RaffleNCPC 2016 | |
| #4765 | Game RankNCPC 2016 | |
| #4766 | Highest TowerNCPC 2016 | |
| #4767 | InterceptionNCPC 2016 | |
| #4768 | Jumbled CompassNCPC 2016 | |
| #4769 | Keeping the Dogs ApartNCPC 2016 | |
| #4770 | Binomial coefficientsNWERC 2011 | |
| #4771 | Bird treeNWERC 2011 | |
| #4772 | Movie collectionNWERC 2011 | |
| #4773 | Piece it togetherNWERC 2011 | |
| #4774 | Please, go firstNWERC 2011 | |
| #4775 | Pool constructionNWERC 2011 | |
| #4776 | Smoking gunNWERC 2011 | |
| #4777 | TichuNWERC 2011 | |
| #4778 | Tracking RFIDsNWERC 2011 | |
| #4779 | Train delaysNWERC 2011 | |
| #4780 | 完美的队列集训队互测 2018 Round 1 | |
| #4781 | 完美的集合集训队互测 2018 Round 1 | |
| #4782 | 完美的旅行集训队互测 2018 Round 1 | |
| #4783 | 神秘货币集训队互测 2018 Round 2Interactive | |
| #4784 | 最小方差生成树集训队互测 2018 Round 2 | |
| #4785 | 有向图集训队互测 2018 Round 2 | |
| #4786 | BalancePetrozavodsk Summer 2017 Day 2 | |
| #4787 | EntanglementPetrozavodsk Summer 2017 Day 2 | |
| #4788 | GravityPetrozavodsk Summer 2017 Day 2 | |
| #4789 | Infinite Pattern MatchingPetrozavodsk Summer 2017 Day 2 | |
| #4790 | InheritancePetrozavodsk Summer 2017 Day 2 | |
| #4791 | MoviesPetrozavodsk Summer 2017 Day 2 | |
| #4792 | OrigamiPetrozavodsk Summer 2017 Day 2 | |
| #4793 | QnpPetrozavodsk Summer 2017 Day 2 | |
| #4794 | SalajPetrozavodsk Summer 2017 Day 2 | |
| #4795 | TaxiPetrozavodsk Summer 2017 Day 2 | |
| #4796 | TrisPetrozavodsk Summer 2017 Day 2 | |
| #4797 | XormitesPetrozavodsk Summer 2017 Day 2 | |
| #4798 | Floor Tiles in a ParkPetrozavodsk Summer 2022 Day 2 | |
| #4799 | Rotate Sum 3Petrozavodsk Summer 2022 Day 2 | |
| #4800 | Oscar's Round Must Have a Constructive ProblemPetrozavodsk Summer 2022 Day 2 | |