| #12801 | Classic QuotationPetrozavodsk Summer 2017 Day 1 | |
| #12802 | Counting DivisorsPetrozavodsk Summer 2017 Day 1 | |
| #12803 | Dirt RatioPetrozavodsk Summer 2017 Day 1 | |
| #12804 | Lazy RunningPetrozavodsk Summer 2017 Day 1 | |
| #12805 | Logical ChainPetrozavodsk Summer 2017 Day 1 | |
| #12806 | Matching in MultiplicationPetrozavodsk Summer 2017 Day 1 | |
| #12807 | Phone CallPetrozavodsk Summer 2017 Day 1 | |
| #12808 | QuestionnairePetrozavodsk Summer 2017 Day 1 | |
| #12809 | Security CheckPetrozavodsk Summer 2017 Day 1 | |
| #12810 | Time to get up!Petrozavodsk Summer 2017 Day 1 | |
| #12811 | Wavel SequencePetrozavodsk Summer 2017 Day 1 | |
| #12812 | Yuno and ClarisPetrozavodsk Summer 2017 Day 1 | |
| #12813 | CandiesPetrozavodsk Summer 2017 Day 4 | |
| #12814 | Binary StringsPetrozavodsk Summer 2017 Day 4 | |
| #12815 | SequencePetrozavodsk Summer 2017 Day 4 | |
| #12816 | Rock-Paper-ScissorsPetrozavodsk Summer 2017 Day 4 | |
| #12817 | CriminalsPetrozavodsk Summer 2017 Day 4 | |
| #12818 | Build the GraphPetrozavodsk Summer 2017 Day 4 | |
| #12819 | MatchPetrozavodsk Summer 2017 Day 4 | |
| #12820 | Subsequence SumsPetrozavodsk Summer 2017 Day 4 | |
| #12821 | Nice NumbersPetrozavodsk Summer 2017 Day 4 | |
| #12822 | K-MatchingPetrozavodsk Summer 2017 Day 4 | |
| #12823 | CompetitionPetrozavodsk Summer 2017 Day 4 | |
| #12824 | ConnectivityPetrozavodsk Summer 2017 Day 6 | |
| #12825 | Hotter-ColderPetrozavodsk Summer 2017 Day 6Interactive | |
| #12826 | PaintingPetrozavodsk Summer 2017 Day 6 | |
| #12827 | OnesPetrozavodsk Summer 2017 Day 6 | |
| #12828 | SeatsPetrozavodsk Summer 2017 Day 6 | |
| #12829 | AntsPetrozavodsk Summer 2017 Day 6 | |
| #12830 | PermutationPetrozavodsk Summer 2017 Day 6 | |
| #12831 | PrimesPetrozavodsk Summer 2017 Day 6 | |
| #12832 | Vertex CoversPetrozavodsk Summer 2017 Day 6 | |
| #12833 | SchedulingPetrozavodsk Summer 2017 Day 6 | |
| #12834 | ShufflePetrozavodsk Summer 2017 Day 6 | |
| #12835 | AdmiralPetrozavodsk Summer 2017 Day 7 | |
| #12836 | Array ChallengePetrozavodsk Summer 2017 Day 7 | |
| #12837 | Boring GamePetrozavodsk Summer 2017 Day 7 | |
| #12838 | Brother and SisterPetrozavodsk Summer 2017 Day 7 | |
| #12839 | Cube SummationPetrozavodsk Summer 2017 Day 7 | |
| #12840 | Function CountingPetrozavodsk Summer 2017 Day 7 | |
| #12841 | Jacana NumbersPetrozavodsk Summer 2017 Day 7 | |
| #12842 | MonkeysPetrozavodsk Summer 2017 Day 7 | |
| #12843 | Rotating LinePetrozavodsk Summer 2017 Day 7 | |
| #12844 | SchedulePetrozavodsk Summer 2017 Day 7 | |
| #12845 | Two PathsPetrozavodsk Summer 2017 Day 7 | |
| #12846 | ExpressionPetrozavodsk Summer 2015 Day 2 | |
| #12847 | Hack It!Petrozavodsk Summer 2015 Day 2 | |
| #12848 | GCD TreePetrozavodsk Summer 2015 Day 2 | |
| #12849 | Too SimplePetrozavodsk Summer 2015 Day 2 | |
| #12850 | Arithmetic SequencePetrozavodsk Summer 2015 Day 2 | |
| #12851 | Persistent Link/cut TreePetrozavodsk Summer 2015 Day 2 | |
| #12852 | Travelling Salesman ProblemPetrozavodsk Summer 2015 Day 2 | |
| #12853 | Goldbach's ConjecturePetrozavodsk Summer 2015 Day 2 | |
| #12854 | Random Inversion MachinePetrozavodsk Summer 2015 Day 2 | |
| #12855 | Sometimes NaivePetrozavodsk Summer 2015 Day 2 | |
| #12856 | ArnoldPetrozavodsk Summer 2015 Day 3 | |
| #12857 | BloomPetrozavodsk Summer 2015 Day 3 | |
| #12858 | CollatzPetrozavodsk Summer 2015 Day 3 | |
| #12859 | DirichletPetrozavodsk Summer 2015 Day 3 | |
| #12860 | EinsteinPetrozavodsk Summer 2015 Day 3Interactive | |
| #12861 | FourierPetrozavodsk Summer 2015 Day 3 | |
| #12862 | GalileiPetrozavodsk Summer 2015 Day 3 | |
| #12863 | HadamardPetrozavodsk Summer 2015 Day 3 | |
| #12864 | IwataniPetrozavodsk Summer 2015 Day 3 | |
| #12865 | JordanPetrozavodsk Summer 2015 Day 3 | |
| #12866 | KuratowskiPetrozavodsk Summer 2015 Day 3 | |
| #12867 | Rectangle QueryPetrozavodsk Summer 2015 Day 4Interactive | |
| #12868 | Game With A FairyPetrozavodsk Summer 2015 Day 4Interactive | |
| #12869 | PortkeysPetrozavodsk Summer 2015 Day 4 | |
| #12870 | Maximal Common SubpairPetrozavodsk Summer 2015 Day 4 | |
| #12871 | k-transpositionsPetrozavodsk Summer 2015 Day 4 | |
| #12872 | PQ treePetrozavodsk Summer 2015 Day 4 | |
| #12873 | Random WalkingPetrozavodsk Summer 2015 Day 4 | |
| #12874 | Sasha And Swag StringsPetrozavodsk Summer 2015 Day 4 | |
| #12875 | Tree ConfrontationPetrozavodsk Summer 2015 Day 4 | |
| #12876 | Two AirlinesPetrozavodsk Summer 2015 Day 4Interactive | |
| #12877 | Christmas TreeACPC 2015 | |
| #12878 | The Lion KingACPC 2015 | |
| #12879 | Cultivating MarsACPC 2015 | |
| #12880 | FractionstellarACPC 2015 | |
| #12881 | The Minions QuizACPC 2015 | |
| #12882 | UberficationACPC 2015 | |
| #12883 | DNA EvolutionACPC 2015 | |
| #12884 | Bingo!ACPC 2015 | |
| #12885 | JourneyACPC 2015 | |
| #12886 | BananaACPC 2015 | |
| #12887 | Road NetworkACPC 2015 | |
| #12888 | Game of PeaceACPC 2014 | |
| #12889 | TawlaACPC 2014 | |
| #12890 | Feast CoinsACPC 2014 | |
| #12891 | Wedding SelfieACPC 2014 | |
| #12892 | Connect the CellsACPC 2014 | |
| #12893 | Bike SharingACPC 2014 | |
| #12894 | Special Christmas TreeACPC 2014 | |
| #12895 | Messed up PicturesACPC 2014 | |
| #12896 | Equivalent PasswordsACPC 2014 | |
| #12897 | Mario and Evil ToadACPC 2014 | |
| #12898 | Vote-Value DisparityJOI Open Contest 2013Output Only | |
| #12899 | SynchronizationJOI Open Contest 2013 | |
| #12900 | WatchingJOI Open Contest 2013 | |