| #12901 | Ambitious PlanPetrozavodsk Winter 2015 Day 8 | |
| #12902 | Borderless WordsPetrozavodsk Winter 2015 Day 8 | |
| #12903 | Catalan Combinatorial ObjectsPetrozavodsk Winter 2015 Day 8 | |
| #12904 | Decomposable Single Word LanguagesPetrozavodsk Winter 2015 Day 8 | |
| #12905 | Elegant SquarePetrozavodsk Winter 2015 Day 8 | |
| #12906 | Four ColorsPetrozavodsk Winter 2015 Day 8Interactive | |
| #12907 | Greater Number WinsPetrozavodsk Winter 2015 Day 8 | |
| #12908 | Higher Math LessonPetrozavodsk Winter 2015 Day 8 | |
| #12909 | IsomorphismPetrozavodsk Winter 2015 Day 8 | |
| #12910 | Jinxiety of a PolyominoPetrozavodsk Winter 2015 Day 8 | |
| #12911 | DreissigPetrozavodsk Summer 2016 Day 5Interactive | |
| #12912 | MondPetrozavodsk Summer 2016 Day 5 | |
| #12913 | OhaPetrozavodsk Summer 2016 Day 5 | |
| #12914 | PruefsummePetrozavodsk Summer 2016 Day 5 | |
| #12915 | RumpfPetrozavodsk Summer 2016 Day 5 | |
| #12916 | StrassePetrozavodsk Summer 2016 Day 5 | |
| #12917 | TabellePetrozavodsk Summer 2016 Day 5 | |
| #12918 | UnrumpfPetrozavodsk Summer 2016 Day 5 | |
| #12919 | VierPetrozavodsk Summer 2016 Day 5 | |
| #12920 | WeltallPetrozavodsk Summer 2016 Day 5 | |
| #12921 | A Poor KingPetrozavodsk Summer 2016 Day 7 | |
| #12922 | Best DivisionPetrozavodsk Summer 2016 Day 7 | |
| #12923 | Convex HullPetrozavodsk Summer 2016 Day 7 | |
| #12924 | Different SumsPetrozavodsk Summer 2016 Day 7 | |
| #12925 | Easy HomeworkPetrozavodsk Summer 2016 Day 7 | |
| #12926 | FlightPetrozavodsk Summer 2016 Day 7 | |
| #12927 | GeneratorPetrozavodsk Summer 2016 Day 7 | |
| #12928 | Honey TourPetrozavodsk Summer 2016 Day 7 | |
| #12929 | Intersection is Not AllowedPetrozavodsk Summer 2016 Day 7 | |
| #12930 | Jong Hyok and StringPetrozavodsk Summer 2016 Day 7 | |
| #12931 | K-valuePetrozavodsk Summer 2016 Day 7 | |
| #12932 | Less Time, More ProfitPetrozavodsk Summer 2016 Day 7 | |
| #12933 | Math is FunPetrozavodsk Summer 2016 Day 7 | |
| #12934 | Area of EffectNAIPC 2015 | |
| #12935 | Canyon MappingNAIPC 2015 | |
| #12936 | Magic CheckerboardNAIPC 2015 | |
| #12937 | Extensive OrNAIPC 2015 | |
| #12938 | Primal PartitionsNAIPC 2015 | |
| #12939 | Sand ArtNAIPC 2015 | |
| #12940 | String StretchingNAIPC 2015 | |
| #12941 | Vending MachineNAIPC 2015 | |
| #12942 | Rainbow ZamboniNAIPC 2015 | |
| #12943 | Zig Zag NametagNAIPC 2015 | |
| #12944 | BanjoNAIPC 2014 | |
| #12945 | CheatsNAIPC 2014 | |
| #12946 | DiplomacyNAIPC 2014 | |
| #12947 | Fantastic ProblemNAIPC 2014 | |
| #12948 | GCDsNAIPC 2014 | |
| #12949 | Gold BanditsNAIPC 2014 | |
| #12950 | Integer Estate AgentNAIPC 2014 | |
| #12951 | ReconnaissanceNAIPC 2014 | |
| #12952 | Super Mario 169NAIPC 2014 | |
| #12953 | Two Knight's PoemNAIPC 2014 | |
| #12954 | The Alphabet StickerACPC 2013 | |
| #12955 | Swyper KeyboardACPC 2013 | |
| #12956 | Increasing Shortest PathACPC 2013 | |
| #12957 | Cup of CowardsACPC 2013 | |
| #12958 | Balloons ColorsACPC 2013 | |
| #12959 | NASSA's RobotACPC 2013 | |
| #12960 | The Stones GameACPC 2013 | |
| #12961 | Super AntsACPC 2013 | |
| #12962 | Omar Loves CandiesACPC 2013 | |
| #12963 | Modified LCSACPC 2013 | |
| #12964 | Mario KartACPC 2013 | |
| #12965 | Omar's BugACPC 2013 | |
| #12966 | The New PresidentACPC 2012 | |
| #12967 | No NameACPC 2012 | |
| #12968 | Encrypted PasswordACPC 2012 | |
| #12969 | Kids Love CandiesACPC 2012 | |
| #12970 | The Swapping GameACPC 2012 | |
| #12971 | Lock PatternACPC 2012 | |
| #12972 | ArcheryACPC 2012 | |
| #12973 | Connecting IslandsACPC 2012 | |
| #12974 | Contest Hall PreparationACPC 2012 | |
| #12975 | Math HomeworkACPC 2012 | |
| #12992 | Counting Is Fun | |
| #12993 | Almost Longest Increasing SubsequencePetrozavodsk Summer 2016 Day 3Interactive | |
| #12994 | Bitwise QueriesPetrozavodsk Summer 2016 Day 3 | |
| #12995 | CocktailsPetrozavodsk Summer 2016 Day 3 | |
| #12996 | DownhillPetrozavodsk Summer 2016 Day 3 | |
| #12997 | Expected LCPPetrozavodsk Summer 2016 Day 3 | |
| #12998 | Finite WalkingPetrozavodsk Summer 2016 Day 3 | |
| #12999 | Guess the DistributionPetrozavodsk Summer 2016 Day 3 | |
| #13000 | Hash TablePetrozavodsk Summer 2016 Day 3 | |