| #12001 | CookiesMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12002 | EvacuationMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12003 | Sum ModuloMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12004 | Xor SumMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12005 | Count Modulo 2Moscow Pre-Finals Workshop 2020 Day 2 | |
| #12006 | RobotsMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12007 | Matrix InversionMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12008 | Construct PointsMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12009 | AmidakujiMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12010 | Median Replace HardMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12011 | Game and QueriesMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12012 | Yosupo's AlgorithmMoscow Pre-Finals Workshop 2020 Day 2 | |
| #12013 | RatingPKUSC 2022 Day 1 | |
| #12014 | 简单计算几何题PKUSC 2022 Day 1 | |
| #12015 | 撸猫PKUSC 2022 Day 1 | |
| #12016 | 随机函数PKUSC 2022 Day 2 | |
| #12017 | Colorful TreePKUSC 2022 Day 2 | |
| #12018 | 雀圣PKUSC 2022 Day 2 | |
| #12019 | Sum TransformationPKUSC 2021 Day 1 | |
| #12020 | 逛街PKUSC 2021 Day 1 | |
| #12021 | 德州扑克PKUSC 2021 Day 1 | |
| #12022 | 一棵树PKUSC 2021 Day 2 | |
| #12023 | 代金券PKUSC 2021 Day 2 | |
| #12024 | 招新PKUSC 2021 Day 2 | |
| #12025 | 排列PKUWC 2020 Day 1 | |
| #12026 | 火山哥的集合PKUWC 2020 Day 1 | |
| #12027 | 数论结构PKUWC 2020 Day 1 | |
| #12028 | 火山哥与打铁传说PKUWC 2020 Day 2 | |
| #12029 | 火山哥与分式PKUWC 2020 Day 2 | |
| #12030 | 最小割PKUWC 2020 Day 2 | |
| #12031 | 村庄PKUSC 2019 Day 1 | |
| #12032 | 乒乓球PKUSC 2019 Day 1 | |
| #12033 | 暗箱操作PKUSC 2019 Day 1 | |
| #12034 | 树 染 色PKUSC 2019 Day 2 | |
| #12035 | 高维树PKUSC 2019 Day 2 | |
| #12036 | 线弦图PKUSC 2019 Day 2 | |
| #12037 | 拓扑序计数PKUWC 2019 Day 1 | |
| #12038 | 一道关于虚树的题PKUWC 2019 Day 1 | |
| #12039 | 地主斗PKUWC 2019 Day 1 | |
| #12040 | 递增序列PKUWC 2019 Day 2 | |
| #12041 | 环图PKUWC 2019 Day 2 | |
| #12042 | 防御塔PKUWC 2019 Day 2 | |
| #12043 | Bubble Sort MachineJOI Open Contest 2025 | |
| #12044 | LotteryJOI Open Contest 2025 | |
| #12045 | TelepathyJOI Open Contest 2025Communication | |
| #12046 | BingoCOCI 2023/2024 Contest #4 | |
| #12047 | KnjigeCOCI 2023/2024 Contest #4 | |
| #12048 | LepezeCOCI 2023/2024 Contest #4 | |
| #12049 | PutovanjeCOCI 2023/2024 Contest #4 | |
| #12050 | RobotiCOCI 2023/2024 Contest #4 | |
| #12051 | ZlagalicaCOCI 2023/2024 Contest #5 | |
| #12052 | BitoviCOCI 2023/2024 Contest #5 | |
| #12053 | Piratski kodCOCI 2023/2024 Contest #5 | |
| #12054 | RoleteCOCI 2023/2024 Contest #5 | |
| #12055 | TrokutCOCI 2023/2024 Contest #5 | |
| #12056 | Array InversionPyongyang Regional 2016 | |
| #12057 | $B_N$Pyongyang Regional 2016 | |
| #12058 | Checking MatrixPyongyang Regional 2016 | |
| #12059 | Dividing Apple-PiePyongyang Regional 2016 | |
| #12060 | Easy Geometry ProblemPyongyang Regional 2016 | |
| #12061 | Finding the Best RoutePyongyang Regional 2016 | |
| #12062 | Good DaysPyongyang Regional 2016 | |
| #12063 | Hyosong and GwangsongPyongyang Regional 2016 | |
| #12064 | International Network ServicePyongyang Regional 2016 | |
| #12065 | Jewel StorePyongyang Regional 2016 | |
| #12066 | K-th Graph CutPyongyang Regional 2016 | |
| #12067 | Long Integer FactoringPyongyang Regional 2016 | |
| #12068 | Saving The Universe AgainCode Jam 2018 Qualification Round | |
| #12069 | Trouble SortCode Jam 2018 Qualification Round | |
| #12070 | Go, Gopher!Code Jam 2018 Qualification RoundInteractive | |
| #12071 | Cubic UFOCode Jam 2018 Qualification Round | |
| #12072 | Waffle ChoppersCode Jam 2018 Round 1A | |
| #12073 | Bit PartyCode Jam 2018 Round 1A | |
| #12074 | Edgy BakingCode Jam 2018 Round 1A | |
| #12075 | Rounding ErrorCode Jam 2018 Round 1B | |
| #12076 | Mysterious Road SignsCode Jam 2018 Round 1B | |
| #12077 | TransmutationCode Jam 2018 Round 1B | |
| #12078 | A Whole New WordCode Jam 2018 Round 1C | |
| #12079 | Lollipop ShopCode Jam 2018 Round 1CInteractive | |
| #12080 | Ant StackCode Jam 2018 Round 1C | |
| #12081 | Falling BallsCode Jam 2018 Round 2 | |
| #12082 | Graceful Chainsaw JugglersCode Jam 2018 Round 2 | |
| #12083 | Costume ChangeCode Jam 2018 Round 2 | |
| #12084 | GridceptionCode Jam 2018 Round 2 | |
| #12085 | Field TripCode Jam 2018 Round 3 | |
| #12086 | Name-Preserving NetworkCode Jam 2018 Round 3Interactive | |
| #12087 | Raise the RoofCode Jam 2018 Round 3 | |
| #12088 | Fence ConstructionCode Jam 2018 Round 3 | |
| #12089 | Jurisdiction RestrictionsCode Jam 2018 World Finals | |
| #12090 | Two-TilingCode Jam 2018 World Finals | |
| #12091 | Go, Gophers!Code Jam 2018 World FinalsInteractive | |
| #12092 | The Cartesian JobCode Jam 2018 World Finals | |
| #12093 | SwordmasterCode Jam 2018 World Finals | |
| #12094 | SweetsPA 2010 Finał | |
| #12095 | Acyclic DecompositionPA 2010 Finał | |
| #12096 | DivisorsPA 2010 Finał | |
| #12097 | Byteball MatchPA 2010 Finał | |
| #12098 | Army TrainingPA 2010 Finał | |
| #12099 | Blindfold NimPA 2010 Finał | |
| #12100 | Termites 2PA 2010 Finał | |