| #2701 | Impressive IntegersGCPC 2020 | |
| #2702 | Jeopardised JourneyGCPC 2020 | |
| #2703 | Knightly KnowledgeGCPC 2020 | |
| #2704 | Lexicographical LecturingGCPC 2020 | |
| #2705 | Mixtape ManagementGCPC 2020 | |
| #2706 | Swap Swap SortCCO 2021 Day 1 | |
| #2707 | Weird Numeral SystemCCO 2021 Day 1 | |
| #2708 | Through Another Maze DarklyCCO 2021 Day 1 | |
| #2709 | Travelling MerchantCCO 2021 Day 2 | |
| #2710 | Bread First SearchCCO 2021 Day 2 | |
| #2711 | Loop TownCCO 2021 Day 2 | |
| #2712 | A Game with GrundyCCO 2020 Day 1 | |
| #2713 | Exercise DeadlinesCCO 2020 Day 1 | |
| #2714 | Mountains and ValleysCCO 2020 Day 1 | |
| #2715 | Travelling SalespersonCCO 2020 Day 2 | |
| #2716 | Interval CollectionCCO 2020 Day 2 | |
| #2717 | Shopping PlansCCO 2020 Day 2 | |
| #2718 | Human ErrorCCO 2019 Day 1 | |
| #2719 | SirtetCCO 2019 Day 1 | |
| #2720 | Winter DrivingCCO 2019 Day 1 | |
| #2721 | Card ScoringCCO 2019 Day 2 | |
| #2722 | Marshmallow MoleculesCCO 2019 Day 2 | |
| #2723 | Bad CodesCCO 2019 Day 2 | |
| #2724 | Geese vs. HawksCCO 2018 Day 1 | |
| #2725 | Wrong AnswerCCO 2018 Day 1 | |
| #2726 | Fun PalaceCCO 2018 Day 1 | |
| #2727 | Gradient DescentCCO 2018 Day 2Interactive | |
| #2728 | Boring LecturesCCO 2018 Day 2 | |
| #2729 | Flop SortingCCO 2018 Day 2 | |
| #2730 | Vera and Trail BuildingCCO 2017 Day 1 | |
| #2731 | Cartesian ConquestCCO 2017 Day 1 | |
| #2732 | Vera and Modern ArtCCO 2017 Day 1 | |
| #2733 | Rainfall CaptureCCO 2017 Day 2 | |
| #2734 | Professional NetworkCCO 2017 Day 2 | |
| #2735 | Shifty GridCCO 2017 Day 2 | |
| #2736 | Field TripCCO 2016 Day 1 | |
| #2737 | Splitting HaresCCO 2016 Day 1 | |
| #2738 | LegendsCCO 2016 Day 1 | |
| #2739 | O CanadaCCO 2016 Day 2 | |
| #2740 | Zombie ApocalypseCCO 2016 Day 2 | |
| #2741 | PiratesCCO 2016 Day 2 | |
| #2742 | ComboIOI 2018 Day 1Interactive | |
| #2743 | SeatsIOI 2018 Day 1 | |
| #2744 | WerewolfIOI 2018 Day 1 | |
| #2745 | Mechanical DollIOI 2018 Day 2 | |
| #2746 | Highway TollsIOI 2018 Day 2Interactive | |
| #2747 | MeetingsIOI 2018 Day 2 | |
| #2748 | Lost is Close to LoseMid-Atlantic USA Regional 2018 | |
| #2749 | Orphan BackupsMid-Atlantic USA Regional 2018 | |
| #2750 | Collusion on Two WheelsMid-Atlantic USA Regional 2018 | |
| #2751 | Find PolyMid-Atlantic USA Regional 2018 | |
| #2752 | Neutral GroundMid-Atlantic USA Regional 2018 | |
| #2753 | Picking Up the DiceMid-Atlantic USA Regional 2018 | |
| #2754 | Playing the SlotsMid-Atlantic USA Regional 2018 | |
| #2755 | Tightly PackedMid-Atlantic USA Regional 2018 | |
| #2756 | NowruzIOI 2017 Day 1Output Only | |
| #2757 | WiringIOI 2017 Day 1 | |
| #2758 | Toy TrainIOI 2017 Day 1 | |
| #2759 | The Big PrizeIOI 2017 Day 2Interactive | |
| #2760 | SimurghIOI 2017 Day 2Interactive | |
| #2761 | Ancient BooksIOI 2017 Day 2 | |
| #2762 | Bitaro the BraveJOI 2018/2019 | |
| #2763 | ExhibitionJOI 2018/2019 | |
| #2764 | Growing Vegetables is Fun 3JOI 2018/2019 | |
| #2765 | Coin CollectingJOI 2018/2019 | |
| #2766 | Unique CitiesJOI 2018/2019 | |
| #2767 | Airport ConstructionWorld Finals 2017 | |
| #2768 | Get a Clue!World Finals 2017 | |
| #2769 | Mission ImprobableWorld Finals 2017 | |
| #2770 | Money for NothingWorld Finals 2017 | |
| #2771 | Need for SpeedWorld Finals 2017 | |
| #2772 | PosterizeWorld Finals 2017 | |
| #2773 | Replicate Replicate RfplicbteWorld Finals 2017 | |
| #2774 | SceneryWorld Finals 2017 | |
| #2775 | Secret Chamber at Mount RushmoreWorld Finals 2017 | |
| #2776 | Son of Pipe StreamWorld Finals 2017 | |
| #2777 | Tarot Sham BoastWorld Finals 2017 | |
| #2778 | Visual Python++World Finals 2017 | |
| #2779 | Detecting MoleculesIOI 2016 Day 1 | |
| #2780 | Roller Coaster RailroadIOI 2016 Day 1 | |
| #2781 | ShortcutIOI 2016 Day 1 | |
| #2782 | Paint By NumbersIOI 2016 Day 2 | |
| #2783 | Unscrambling a Messy BugIOI 2016 Day 2Interactive | |
| #2784 | AliensIOI 2016 Day 2 | |
| #2785 | Boxes with souvenirsIOI 2015 Day 1 | |
| #2786 | ScalesIOI 2015 Day 1Interactive | |
| #2787 | TeamsIOI 2015 Day 1 | |
| #2788 | HorsesIOI 2015 Day 2 | |
| #2789 | SortingIOI 2015 Day 2 | |
| #2790 | TownsIOI 2015 Day 2Interactive | |
| #2791 | 背单词SCOI 2016 Day 1 | |
| #2792 | 幸运数字SCOI 2016 Day 1 | |
| #2793 | 萌萌哒SCOI 2016 Day 1 | |
| #2794 | 妖怪SCOI 2016 Day 2 | |
| #2795 | 美味SCOI 2016 Day 2 | |
| #2796 | 围棋SCOI 2016 Day 2 | |
| #2797 | City of LightsSWERC 2018 | |
| #2798 | Blurred PicturesSWERC 2018 | |
| #2799 | CrosswordsSWERC 2018 | |
| #2800 | Monument TourSWERC 2018 | |