| #12201 | Arrangement of CarrotsPetrozavodsk Winter 2012 Day 7 | |
| #12202 | Brilliant StarsPetrozavodsk Winter 2012 Day 7 | |
| #12203 | Common PalindromesPetrozavodsk Winter 2012 Day 7 | |
| #12204 | Dangerous TowerPetrozavodsk Winter 2012 Day 7 | |
| #12205 | Ear TeleportationPetrozavodsk Winter 2012 Day 7 | |
| #12206 | Following are EquivalentPetrozavodsk Winter 2012 Day 7 | |
| #12207 | Ground ConstructionPetrozavodsk Winter 2012 Day 7 | |
| #12208 | Hidden PalindromePetrozavodsk Winter 2012 Day 7 | |
| #12209 | Interfering the CatPetrozavodsk Winter 2012 Day 7 | |
| #12210 | Jumping LimitsPetrozavodsk Winter 2012 Day 7 | |
| #12211 | Angle BeatsPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12212 | Best SubsequencePetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12213 | Cool pairsPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12214 | DatesPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12215 | Expected ValuePetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12216 | Free EdgesPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12217 | Graph CountingPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12218 | Hall's TheoremPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12219 | Interesting GraphPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12220 | Jealous SplitPetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12221 | KnowledgePetrozavodsk Winter 2019 Day 1300iq Contest 1 | |
| #12222 | AhoPetrozavodsk Winter 2015 Day 4Interactive | |
| #12223 | BanachPetrozavodsk Winter 2015 Day 4 | |
| #12224 | ConwayPetrozavodsk Winter 2015 Day 4 | |
| #12225 | DirichletPetrozavodsk Winter 2015 Day 4 | |
| #12226 | EuclidPetrozavodsk Winter 2015 Day 4 | |
| #12227 | FulkersonPetrozavodsk Winter 2015 Day 4 | |
| #12228 | GaloisPetrozavodsk Winter 2015 Day 4 | |
| #12229 | HararyPetrozavodsk Winter 2015 Day 4 | |
| #12230 | ItoPetrozavodsk Winter 2015 Day 4 | |
| #12231 | JordanPetrozavodsk Winter 2015 Day 4 | |
| #12232 | KolmogorovPetrozavodsk Winter 2015 Day 4 | |
| #12233 | Car RaceBalkan OI 2023 Day 1 | |
| #12234 | WeightsBalkan OI 2023 Day 1 | |
| #12235 | PermutationsBalkan OI 2023 Day 1 | |
| #12236 | Super TreeBalkan OI 2023 Day 2 | |
| #12237 | Save the Vine!Balkan OI 2023 Day 2 | |
| #12238 | AliensBalkan OI 2023 Day 2 | |
| #12239 | 最大 XOR 和路径WC 2011 | |
| #12240 | 拼点游戏WC 2011 | |
| #12241 | 关系挖掘WC 2011Output Only | |
| #12254 | LadderPetrozavodsk Winter 2015 Day 6 | |
| #12255 | 36 PuzzlePetrozavodsk Winter 2015 Day 6 | |
| #12256 | MessagePetrozavodsk Winter 2015 Day 6 | |
| #12257 | Arithmetic SequencesPetrozavodsk Winter 2015 Day 6 | |
| #12258 | SubsequencePetrozavodsk Winter 2015 Day 6 | |
| #12259 | Algebra is AwesomePetrozavodsk Winter 2015 Day 6 | |
| #12260 | Bus LinesPetrozavodsk Winter 2015 Day 6 | |
| #12261 | Coal MinePetrozavodsk Winter 2015 Day 6 | |
| #12262 | Chocolate is TastyPetrozavodsk Winter 2015 Day 6 | |
| #12263 | GamePetrozavodsk Winter 2015 Day 6 | |
| #12264 | Tic-tac-toePetrozavodsk Winter 2015 Day 6 | |
| #12265 | Oversized Pancake FlipperCode Jam 2017 Qualification Round | |
| #12266 | Tidy NumbersCode Jam 2017 Qualification Round | |
| #12267 | Bathroom StallsCode Jam 2017 Qualification Round | |
| #12268 | Fashion ShowCode Jam 2017 Qualification Round | |
| #12269 | Alphabet CakeCode Jam 2017 Round 1A | |
| #12270 | RatatouilleCode Jam 2017 Round 1A | |
| #12271 | Play the DragonCode Jam 2017 Round 1A | |
| #12272 | Steed 2: Cruise ControlCode Jam 2017 Round 1B | |
| #12273 | Stable Neigh-borsCode Jam 2017 Round 1B | |
| #12274 | Pony ExpressCode Jam 2017 Round 1B | |
| #12275 | Ample SyrupCode Jam 2017 Round 1C | |
| #12276 | Parenting PartneringCode Jam 2017 Round 1C | |
| #12277 | Core TrainingCode Jam 2017 Round 1C | |
| #12278 | Fresh ChocolateCode Jam 2017 Round 2 | |
| #12279 | Roller Coaster SchedulingCode Jam 2017 Round 2 | |
| #12280 | Beaming With JoyCode Jam 2017 Round 2 | |
| #12281 | Shoot the TurretsCode Jam 2017 Round 2 | |
| #12282 | GooglementsCode Jam 2017 Round 3 | |
| #12283 | Good News and Bad NewsCode Jam 2017 Round 3 | |
| #12284 | Mountain TourCode Jam 2017 Round 3 | |
| #12285 | Slate ModernCode Jam 2017 Round 3 | |
| #12286 | Dice StraightCode Jam 2017 World Finals | |
| #12287 | OperationCode Jam 2017 World Finals | |
| #12288 | Spanning PlanningCode Jam 2017 World Finals | |
| #12289 | OmnicircumnavigationCode Jam 2017 World Finals | |
| #12290 | Stack ManagementCode Jam 2017 World Finals | |
| #12291 | TeleportersCode Jam 2017 World Finals | |
| #12292 | Road Network 2PA 2011 Próbny Finał | |
| #12293 | Computational BiologyPA 2011 Finał | |
| #12294 | Byteland Worldbeat PublishersPA 2011 Finał | |
| #12295 | ExamPA 2011 Finał | |
| #12296 | Computational GeometryPA 2011 Finał | |
| #12297 | Coprime NumbersPA 2011 Finał | |
| #12298 | TelescopePA 2011 Finał | |
| #12299 | Prime prime powerPA 2011 Finał | |
| #12300 | Hard ChoicePA 2011 Finał | |