| #13001 | ImmigrationPetrozavodsk Summer 2016 Day 3 | |
| #13002 | Jumping on a TreePetrozavodsk Summer 2016 Day 3 | |
| #13003 | King's RoadsPetrozavodsk Summer 2016 Day 3 | |
| #13004 | Hacker Cups and BallsPetrozavodsk Winter 2017 Day 7 | |
| #13005 | Bored DreamoonPetrozavodsk Winter 2017 Day 7 | |
| #13006 | Crazy DreamoonPetrozavodsk Winter 2017 Day 7 | |
| #13007 | Forest GamePetrozavodsk Winter 2017 Day 7 | |
| #13008 | Lines GamePetrozavodsk Winter 2017 Day 7 | |
| #13009 | Lonely Dreamoon 2Petrozavodsk Winter 2017 Day 7 | |
| #13010 | Dreamoon and NightMarketPetrozavodsk Winter 2017 Day 7 | |
| #13011 | Split GamePetrozavodsk Winter 2017 Day 7 | |
| #13012 | Tree GamePetrozavodsk Winter 2017 Day 7 | |
| #13013 | Zero GamePetrozavodsk Winter 2017 Day 7 | |
| #13014 | Square FunctionPetrozavodsk Summer 2016 Day 7 | |
| #13015 | Guess by RemainderPetrozavodsk Summer 2016 Day 7Interactive | |
| #13016 | Subtract if Greater!Petrozavodsk Summer 2016 Day 7 | |
| #13017 | Eastern SubregionalPetrozavodsk Summer 2016 Day 7Interactive | |
| #13018 | K-transformPetrozavodsk Summer 2016 Day 7 | |
| #13019 | Suffix Array for Thue-MorsePetrozavodsk Summer 2016 Day 7 | |
| #13020 | XOR TreePetrozavodsk Summer 2016 Day 7 | |
| #13021 | FencePetrozavodsk Summer 2016 Day 7 | |
| #13022 | Friends and Berries - 2Petrozavodsk Summer 2016 Day 7 | |
| #13023 | Oleg and ColaPetrozavodsk Summer 2016 Day 7 | |
| #13024 | Process with Constant SumPetrozavodsk Summer 2016 Day 7 | |
| #13025 | BermutationPetrozavodsk Winter 2015 Day 7 | |
| #13026 | GridPetrozavodsk Winter 2015 Day 7 | |
| #13027 | HeapPetrozavodsk Winter 2015 Day 7 | |
| #13028 | LinesPetrozavodsk Winter 2015 Day 7 | |
| #13029 | Yet Another Problem About PermutationsPetrozavodsk Winter 2015 Day 7 | |
| #13030 | Strange SequencePetrozavodsk Winter 2015 Day 7 | |
| #13031 | Shortest Accepted WordPetrozavodsk Winter 2015 Day 7 | |
| #13032 | WorkPetrozavodsk Winter 2015 Day 7 | |
| #13033 | BowlingBaltic OI 2015 Day 1 | |
| #13034 | EditorBaltic OI 2015 Day 1 | |
| #13035 | NetworkBaltic OI 2015 Day 1 | |
| #13036 | File PathsBaltic OI 2015 Day 2 | |
| #13037 | HackerBaltic OI 2015 Day 2 | |
| #13038 | Tug of WarBaltic OI 2015 Day 2 | |
| #13039 | AliensIOI 2007 Day 1Interactive | |
| #13040 | FloodIOI 2007 Day 1 | |
| #13041 | SailsIOI 2007 Day 1 | |
| #13042 | MinersIOI 2007 Day 2 | |
| #13043 | PairsIOI 2007 Day 2 | |
| #13044 | TrainingIOI 2007 Day 2 | |
| #13045 | Angle PatternsPetrozavodsk Summer 2015 Day 6 | |
| #13046 | Best StrategyPetrozavodsk Summer 2015 Day 6 | |
| #13047 | Coin GamePetrozavodsk Summer 2015 Day 6 | |
| #13048 | DominationPetrozavodsk Summer 2015 Day 6 | |
| #13049 | EquationPetrozavodsk Summer 2015 Day 6 | |
| #13050 | Safe FlightPetrozavodsk Summer 2015 Day 6 | |
| #13051 | Version Control SystemPetrozavodsk Summer 2015 Day 6 | |
| #13052 | HackPetrozavodsk Summer 2015 Day 6 | |
| #13053 | Optimal ChoicePetrozavodsk Summer 2015 Day 6 | |
| #13054 | JeopardyPetrozavodsk Summer 2015 Day 6 | |
| #13055 | AutomatPetrozavodsk Summer 2015 Day 7 | |
| #13056 | BaumPetrozavodsk Summer 2015 Day 7 | |
| #13057 | EntfernungPetrozavodsk Summer 2015 Day 7 | |
| #13058 | GeldPetrozavodsk Summer 2015 Day 7 | |
| #13059 | MannschaftPetrozavodsk Summer 2015 Day 7 | |
| #13060 | QuadratPetrozavodsk Summer 2015 Day 7 | |
| #13061 | SprachePetrozavodsk Summer 2015 Day 7 | |
| #13062 | SteigungPetrozavodsk Summer 2015 Day 7 | |
| #13063 | VieleckPetrozavodsk Summer 2015 Day 7 | |
| #13064 | ZubereitungPetrozavodsk Summer 2015 Day 7 | |
| #13065 | A String Game是男人就过8题 | |
| #13066 | Equations And Inequations是男人就过8题 | |
| #13067 | Interval Tree是男人就过8题 | |
| #13068 | Intervals是男人就过8题 | |
| #13069 | Number Game With One Lie是男人就过8题 | |
| #13070 | Number Link是男人就过8题 | |
| #13071 | Perfect NP Array是男人就过8题 | |
| #13072 | Sign Location是男人就过8题 | |
| #13073 | Deciphering the Mayan WritingIOI 2006 Day 1 | |
| #13074 | PyramidIOI 2006 Day 1 | |
| #13075 | Forbidden SubgraphIOI 2006 Day 1Output Only | |
| #13076 | The Valley of MexicoIOI 2006 Day 2 | |
| #13077 | Joining PointsIOI 2006 Day 2 | |
| #13079 | 机器人NOI 2025 Day 1 | |
| #13080 | 序列变换NOI 2025 Day 1 | |
| #13081 | 数字树NOI 2025 Day 1 | |
| #13082 | 三目运算符NOI 2025 Day 2 | |
| #13083 | 集合NOI 2025 Day 2 | |
| #13084 | 绝对防御NOI 2025 Day 2 | |
| #13085 | CircuitsSeoul Regional 2018 | |
| #13086 | Cosmetic SurveySeoul Regional 2018 | |
| #13087 | Disks ArrangementSeoul Regional 2018 | |
| #13088 | Go LatinSeoul Regional 2018 | |
| #13089 | LEDSeoul Regional 2018 | |
| #13090 | ParenthesesSeoul Regional 2018 | |
| #13091 | Secret CodeSeoul Regional 2018 | |
| #13092 | Simple PolygonSeoul Regional 2018 | |
| #13093 | Square RootSeoul Regional 2018 | |
| #13094 | StarwarsSeoul Regional 2018 | |
| #13095 | TV Show GameSeoul Regional 2018 | |
| #13096 | Working PlanSeoul Regional 2018 | |
| #13097 | A + BPetrozavodsk Summer 2015 Day 9 | |
| #13098 | Break FreePetrozavodsk Summer 2015 Day 9 | |
| #13099 | Covering Words with CarryingPetrozavodsk Summer 2015 Day 9 | |
| #13100 | DecisionsPetrozavodsk Summer 2015 Day 9 | |