| #12601 | Master Zhu and VideoPetrozavodsk Summer 2017 Day 8 | |
| #12602 | Master Zhu and PolygonsPetrozavodsk Summer 2017 Day 8 | |
| #12603 | Master Zhu and RootPetrozavodsk Summer 2017 Day 8 | |
| #12604 | Master Zhu and Binary TreesPetrozavodsk Summer 2017 Day 8 | |
| #12605 | Master Zhu and InstabilityPetrozavodsk Summer 2017 Day 8 | |
| #12606 | Master Zhu and Math ProblemPetrozavodsk Summer 2017 Day 8 | |
| #12607 | Master Zhu and the LeaperPetrozavodsk Summer 2017 Day 8 | |
| #12608 | Building 2JOISC 2012 Day 1Petrozavodsk Summer 2017 Day 9 | |
| #12609 | FishJOISC 2012 Day 1Petrozavodsk Summer 2017 Day 9 | |
| #12610 | JOI FlagJOISC 2012 Day 1Petrozavodsk Summer 2017 Day 9 | |
| #12611 | BroadcastingJOISC 2012 Day 2Output Only | |
| #12612 | ConstellationJOISC 2012 Day 2Petrozavodsk Summer 2017 Day 9 | |
| #12613 | RotateJOISC 2012 Day 2Petrozavodsk Summer 2017 Day 9 | |
| #12614 | Fortune TellingJOISC 2012 Day 3Petrozavodsk Summer 2017 Day 9 | |
| #12615 | KangarooJOISC 2012 Day 3Petrozavodsk Summer 2017 Day 9 | |
| #12616 | SokobanJOISC 2012 Day 3Petrozavodsk Summer 2017 Day 9 | |
| #12617 | ChineseJOISC 2012 Day 4Petrozavodsk Summer 2017 Day 9 | |
| #12618 | Copy and PasteJOISC 2012 Day 4 | |
| #12619 | InvitationJOISC 2012 Day 4Petrozavodsk Summer 2017 Day 9 | |
| #12620 | Awesome ShawarmaACPC 2018 | |
| #12621 | Baklava TrayACPC 2018 | |
| #12622 | CoffeeACPC 2018 | |
| #12623 | Dull ChocolatesACPC 2018 | |
| #12624 | Exciting MenusACPC 2018 | |
| #12625 | Flipping El-fetieraACPC 2018 | |
| #12626 | Greatest Chicken DishACPC 2018 | |
| #12627 | Hawawshi DecryptionACPC 2018 | |
| #12628 | Ice-cream KnapsackACPC 2018 | |
| #12629 | Journey to JupiterACPC 2018 | |
| #12630 | KhoshafACPC 2018 | |
| #12631 | Looking for TasteACPC 2018 | |
| #12632 | Count the GraphsACPC 2017 | |
| #12633 | Game of Nim EverywhereACPC 2017 | |
| #12634 | FIFA World CupACPC 2017 | |
| #12635 | Crazy LCPACPC 2017 | |
| #12636 | This Means WarACPC 2017 | |
| #12637 | The Walking AdamACPC 2017 | |
| #12638 | Darts GameACPC 2017 | |
| #12639 | Stock ExchangeACPC 2017 | |
| #12640 | Winter is HereACPC 2017 | |
| #12641 | Array QueriesACPC 2017 | |
| #12642 | Duplicate FilesACPC 2017 | |
| #12643 | CluedoIOI 2010 Day 1Interactive | |
| #12644 | Hotter ColderIOI 2010 Day 1Interactive | |
| #12645 | Quality of LivingIOI 2010 Day 1 | |
| #12646 | LanguagesIOI 2010 Day 1Interactive | |
| #12647 | MemoryIOI 2010 Day 2Interactive | |
| #12648 | Traffic CongestionIOI 2010 Day 2 | |
| #12649 | MazeIOI 2010 Day 2Output Only | |
| #12650 | SaveitIOI 2010 Day 2Communication | |
| #12651 | CirclesPetrozavodsk Summer 2016 Day 9 | |
| #12652 | Point PairsPetrozavodsk Summer 2016 Day 9 | |
| #12653 | House MovingPetrozavodsk Summer 2016 Day 9 | |
| #12654 | Nice Set of PointsPetrozavodsk Summer 2016 Day 9 | |
| #12655 | Eel and GridPetrozavodsk Summer 2016 Day 9 | |
| #12656 | Right Angle PaintingPetrozavodsk Summer 2016 Day 9 | |
| #12657 | Rectangle-Free GridPetrozavodsk Summer 2016 Day 9 | |
| #12658 | Cups and BeansPetrozavodsk Summer 2016 Day 9 | |
| #12659 | Edge ColoringPetrozavodsk Summer 2016 Day 9 | |
| #12660 | Travel in Sugar CountryPetrozavodsk Summer 2016 Day 9 | |
| #12661 | Type PrinterIOI 2008 Day 1 | |
| #12662 | IslandsIOI 2008 Day 1 | |
| #12663 | FishIOI 2008 Day 1 | |
| #12664 | Linear GardenIOI 2008 Day 2 | |
| #12665 | Pyramid BaseIOI 2008 Day 2 | |
| #12666 | TeleportersIOI 2008 Day 2 | |
| #12667 | 社交网络NOI 2007 Day 1 | |
| #12668 | 货币兑换NOI 2007 Day 1 | |
| #12669 | 调兵遣将NOI 2007 Day 1Output Only | |
| #12670 | 项链工厂NOI 2007 Day 2 | |
| #12671 | 生成树计数NOI 2007 Day 2 | |
| #12672 | 追捕盗贼NOI 2007 Day 2 | |
| #12673 | 网络收费NOI 2006 Day 1 | |
| #12674 | 生日快乐NOI 2006 Day 1Interactive | |
| #12675 | 千年虫NOI 2006 Day 1 | |
| #12676 | 最大获利NOI 2006 Day 2 | |
| #12677 | 聪明的导游NOI 2006 Day 2Output Only | |
| #12678 | 神奇口袋NOI 2006 Day 2 | |
| #12679 | 瑰丽华尔兹NOI 2005 Day 1 | |
| #12680 | 维护数列NOI 2005 Day 1 | |
| #12681 | 智慧珠游戏NOI 2005 Day 1 | |
| #12682 | 聪聪和可可NOI 2005 Day 2 | |
| #12683 | 小 H 的聚会NOI 2005 Day 2Output Only | |
| #12684 | 月下柠檬树NOI 2005 Day 2 | |
| #12685 | Tourist AttractionsXIV Olimpiada Informatyczna – I etapPOI 2006/2007 Stage 1 | |
| #12686 | OfficesXIV Olimpiada Informatyczna – I etapPOI 2006/2007 Stage 1 | |
| #12687 | TreesXIV Olimpiada Informatyczna – I etapPOI 2006/2007 Stage 1 | |
| #12688 | Axes of SymmetryXIV Olimpiada Informatyczna – I etapPOI 2006/2007 Stage 1 | |
| #12689 | QueriesXIV Olimpiada Informatyczna – I etapPOI 2006/2007 Stage 1 | |
| #12690 | Ridges and ValleysXIV Olimpiada Informatyczna – II etapPOI 2006/2007 Stage 2 | |
| #12691 | The FloodXIV Olimpiada Informatyczna – II etapPOI 2006/2007 Stage 2 | |
| #12692 | Rock Garden XIV Olimpiada Informatyczna – II etapPOI 2006/2007 Stage 2 | |
| #12693 | MegalopolisXIV Olimpiada Informatyczna – II etapPOI 2006/2007 Stage 2 | |
| #12694 | Tetris AttackXIV Olimpiada Informatyczna – II etapPOI 2006/2007 Stage 2 | |
| #12695 | RailwayXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |
| #12696 | Gas PipelinesXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |
| #12697 | WeightsXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |
| #12698 | Driving ExamXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |
| #12699 | Building blocksXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |
| #12700 | Quaternary balanceXIV Olimpiada Informatyczna – III etapPOI 2006/2007 Stage 3 | |