| #2601 | Lucky TicketsPetrozavodsk Winter 2022 Day 5 | |
| #2602 | Diversity StreetPetrozavodsk Winter 2022 Day 5 | |
| #2603 | DisbalancePetrozavodsk Winter 2022 Day 5 | |
| #2604 | Spiral MatrixPetrozavodsk Winter 2022 Day 5 | |
| #2605 | Soccer MatchPetrozavodsk Winter 2022 Day 6 | |
| #2606 | GachaponPetrozavodsk Winter 2022 Day 6 | |
| #2607 | SurveyPetrozavodsk Winter 2022 Day 6 | |
| #2608 | StationPetrozavodsk Winter 2022 Day 6 | |
| #2609 | Number GuessingPetrozavodsk Winter 2022 Day 6Interactive | |
| #2610 | Build a CityPetrozavodsk Winter 2022 Day 6 | |
| #2611 | TransPetrozavodsk Winter 2022 Day 6 | |
| #2612 | Blind BoxPetrozavodsk Winter 2022 Day 6 | |
| #2613 | EIP1559Petrozavodsk Winter 2022 Day 6 | |
| #2614 | Three CountriesPetrozavodsk Winter 2022 Day 6 | |
| #2615 | Surround the CatPetrozavodsk Winter 2022 Day 6Interactive | |
| #2616 | Attack OrderPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2617 | Browsing the CollectionPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2618 | Casual DancersPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2619 | Diameter TwoPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2620 | Escaped from NEFPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2621 | First OccurrencePetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2622 | Gross LCSPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2623 | Hundred Thousand PointsPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2624 | Implemented IncorrectlyPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2625 | Junk or JoyPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2626 | Kilk NotPetrozavodsk Winter 2022 Day 7Gennady Korotkevich Contest | |
| #2627 | IntercastellarJOI 2021/2022JOI 2021/2022 | |
| #2628 | Self StudyJOI 2021/2022JOI 2021/2022 | |
| #2629 | Let's Win the ElectionJOI 2021/2022JOI 2021/2022 | |
| #2630 | Railway Trip 2JOI 2021/2022JOI 2021/2022 | |
| #2631 | Sandcastle 2JOI 2021/2022JOI 2021/2022 | |
| #2632 | Ascending PhotoNWERC 2017 | |
| #2633 | Boss BattleNWERC 2017 | |
| #2634 | Connect the DotsNWERC 2017 | |
| #2635 | DunglishNWERC 2017 | |
| #2636 | English RestaurantNWERC 2017 | |
| #2637 | Factor-Free TreeNWERC 2017 | |
| #2638 | Glyph RecognitionNWERC 2017 | |
| #2639 | High ScoreNWERC 2017 | |
| #2640 | Installing AppsNWERC 2017 | |
| #2641 | Juggling TroupeNWERC 2017 | |
| #2642 | Knockout TournamentNWERC 2017 | |
| #2643 | Bubble Sort 2JOI Open Contest 2018 | |
| #2644 | Cats or DogsJOI Open Contest 2018 | |
| #2645 | CollapseJOI Open Contest 2018 | |
| #2646 | XylophoneJOI Open Contest 2018Interactive | |
| #2647 | Environment-Friendly TravelSWERC 2019 | |
| #2648 | BiodiversitySWERC 2019 | |
| #2649 | AntsSWERC 2019 | |
| #2650 | GnalcatsSWERC 2019 | |
| #2651 | PixelsSWERC 2019 | |
| #2652 | IcebergsSWERC 2019 | |
| #2653 | Swapping PlacesSWERC 2019 | |
| #2654 | Pseudo-Random Number GeneratorSWERC 2019 | |
| #2655 | RatsSWERC 2019 | |
| #2656 | Counting TreesSWERC 2019 | |
| #2657 | Bird WatchingSWERC 2019 | |
| #2658 | River GameSWERC 2019 | |
| #2659 | Armia klonówXXIX Olimpiada Informatyczna – II etap, Dzień próbnaPOI 2021 Stage 2 Trial Day | |
| #2660 | AgenciXXIX Olimpiada Informatyczna – II etap, Dzień pierwszyPOI 2021 Stage 2 Day 1 | |
| #2661 | Liczby względnie pierwszeXXIX Olimpiada Informatyczna – II etap, Dzień pierwszyPOI 2021 Stage 2 Day 1 | |
| #2662 | BombermanXXIX Olimpiada Informatyczna – II etap, Dzień drugiPOI 2021 Stage 2 Day 2 | |
| #2663 | Konkurs tańca towarzyskiegoXXIX Olimpiada Informatyczna – II etap, Dzień drugiPOI 2021 Stage 2 Day 2 | |
| #2667 | 挑战 NPCWC 2016 | |
| #2668 | 论战捆竹竿WC 2016 | |
| #2669 | 鏖战表达式WC 2016Interactive | |
| #2670 | Arranging shoesIOI 2019 Day 1 | |
| #2671 | Split the attractionsIOI 2019 Day 1 | |
| #2672 | RectanglesIOI 2019 Day 1 | |
| #2673 | Broken lineIOI 2019 Day 2Output Only | |
| #2674 | Vision programIOI 2019 Day 2Interactive | |
| #2675 | Sky walkingIOI 2019 Day 2 | |
| #2676 | 鱼HNOI 2019 | |
| #2677 | JOJOHNOI 2019 | |
| #2678 | 多边形HNOI 2019 | |
| #2679 | 校园旅行HNOI 2019 | |
| #2680 | 白兔之舞HNOI 2019 | |
| #2681 | 序列HNOI 2019 | |
| #2682 | Arranging HatNWERC 2016 | |
| #2683 | British MenuNWERC 2016 | |
| #2684 | Careful AscentNWERC 2016 | |
| #2685 | Driving in OptimistanNWERC 2016 | |
| #2686 | Exam RedistributionNWERC 2016 | |
| #2687 | Free WeightsNWERC 2016 | |
| #2688 | Gotta Nudge 'Em AllNWERC 2016 | |
| #2689 | Hamiltonian HypercubeNWERC 2016 | |
| #2690 | Iron and CoalNWERC 2016 | |
| #2691 | Jupiter OrbiterNWERC 2016 | |
| #2692 | Kiwi TreesNWERC 2016 | |
| #2693 | Adolescent ArchitectureGCPC 2020 | |
| #2694 | Bookshelf BuildingGCPC 2020 | |
| #2695 | Confined CatchingGCPC 2020Interactive | |
| #2696 | Decorative DominoesGCPC 2020 | |
| #2697 | Exhausting ErrandsGCPC 2020 | |
| #2698 | Flip FlowGCPC 2020 | |
| #2699 | Gravity GridGCPC 2020 | |
| #2700 | Hectic HarbourGCPC 2020 | |