| #12701 | AsciiNEERC 2013NERC 2013 | |
| #12702 | Bonus CardsNEERC 2013NERC 2013 | |
| #12703 | Cactus AutomorphismsNEERC 2013NERC 2013 | |
| #12704 | DictionaryNEERC 2013NERC 2013 | |
| #12705 | Easy GeometryNEERC 2013NERC 2013 | |
| #12706 | Fraud BustersNEERC 2013NERC 2013 | |
| #12707 | Green EnergyNEERC 2013NERC 2013 | |
| #12708 | Hack ProtectionNEERC 2013NERC 2013 | |
| #12709 | Interactive InterceptionNEERC 2013NERC 2013Interactive | |
| #12710 | Join the ConversationNEERC 2013NERC 2013 | |
| #12711 | Kabaleo LiteNEERC 2013NERC 2013 | |
| #12712 | Auxiliary ProjectNorthern Subregional 2017NWRRC 2017 | |
| #12713 | Boolean SatisfiabilityNorthern Subregional 2017NWRRC 2017 | |
| #12714 | Consonant FencityNorthern Subregional 2017NWRRC 2017 | |
| #12715 | Dividing MarblesNorthern Subregional 2017NWRRC 2017 | |
| #12716 | Equal NumbersNorthern Subregional 2017NWRRC 2017 | |
| #12717 | Fygon 2.0Northern Subregional 2017NWRRC 2017 | |
| #12718 | Grand TestNorthern Subregional 2017NWRRC 2017 | |
| #12719 | Hidden SupervisorsNorthern Subregional 2017NWRRC 2017 | |
| #12720 | Intelligence in PerpendiculariaNorthern Subregional 2017NWRRC 2017 | |
| #12721 | JokerNorthern Subregional 2017NWRRC 2017 | |
| #12722 | Kotlin IslandNorthern Subregional 2017NWRRC 2017 | |
| #12723 | Little DifferenceNorthern Subregional 2017NWRRC 2017 | |
| #12724 | Anniversary CakeNorthern Subregional 2016NWRRC 2016 | |
| #12725 | Boys and GirlsNorthern Subregional 2016NWRRC 2016 | |
| #12726 | CodeCoder vs TopForcesNorthern Subregional 2016NWRRC 2016 | |
| #12727 | Digital AdditionNorthern Subregional 2016NWRRC 2016 | |
| #12728 | Easy ReadingNorthern Subregional 2016NWRRC 2016 | |
| #12729 | FoldingNorthern Subregional 2016NWRRC 2016 | |
| #12730 | Gangsters in Central CityNorthern Subregional 2016NWRRC 2016 | |
| #12731 | Hard CutsNorthern Subregional 2016NWRRC 2016 | |
| #12732 | Integral PolygonsNorthern Subregional 2016NWRRC 2016 | |
| #12733 | Java2016Northern Subregional 2016NWRRC 2016 | |
| #12734 | King's HeirNorthern Subregional 2016NWRRC 2016 | |
| #12735 | Alex Origami SquaresNorthern Subregional 2015NWRRC 2015 | |
| #12736 | Black and WhiteNorthern Subregional 2015NWRRC 2015 | |
| #12737 | ConcatenationNorthern Subregional 2015NWRRC 2015 | |
| #12738 | Distribution in MetagoniaNorthern Subregional 2015NWRRC 2015 | |
| #12739 | Easy ArithmeticNorthern Subregional 2015NWRRC 2015 | |
| #12740 | FygonNorthern Subregional 2015NWRRC 2015 | |
| #12741 | GraphNorthern Subregional 2015NWRRC 2015 | |
| #12742 | Hash Code HackerNorthern Subregional 2015NWRRC 2015 | |
| #12743 | Insider's InformationNorthern Subregional 2015NWRRC 2015 | |
| #12744 | Journey to the “The World's Start”Northern Subregional 2015NWRRC 2015 | |
| #12745 | Kingdom TripNorthern Subregional 2015NWRRC 2015 | |
| #12746 | Lucky ChancesNorthern Subregional 2015NWRRC 2015 | |
| #12747 | Alarm ClockNorthern Subregional 2014NWRRC 2014 | |
| #12748 | BuffcraftNorthern Subregional 2014NWRRC 2014 | |
| #12749 | Combinator ExpressionNorthern Subregional 2014NWRRC 2014 | |
| #12750 | DigitsNorthern Subregional 2014NWRRC 2014 | |
| #12751 | ExpressionNorthern Subregional 2014NWRRC 2014 | |
| #12752 | FragmentationNorthern Subregional 2014NWRRC 2014 | |
| #12753 | GraveNorthern Subregional 2014NWRRC 2014 | |
| #12754 | Hiking in the HillsNorthern Subregional 2014NWRRC 2014 | |
| #12755 | InstructionNorthern Subregional 2014NWRRC 2014 | |
| #12756 | Joy of FlightNorthern Subregional 2014NWRRC 2014 | |
| #12757 | Kebab HouseNorthern Subregional 2014NWRRC 2014 | |
| #12758 | Arrangement of ContestNorthern Subregional 2013NWRRC 2013 | |
| #12759 | Ballot Analyzing DeviceNorthern Subregional 2013NWRRC 2013 | |
| #12760 | Correcting CuriosityNorthern Subregional 2013NWRRC 2013 | |
| #12761 | Dwarf TowerNorthern Subregional 2013NWRRC 2013 | |
| #12762 | Energy TycoonNorthern Subregional 2013NWRRC 2013 | |
| #12763 | Flight Boarding OptimizationNorthern Subregional 2013NWRRC 2013 | |
| #12764 | GarageNorthern Subregional 2013NWRRC 2013 | |
| #12765 | Heavy Chain ClusterizationNorthern Subregional 2013NWRRC 2013 | |
| #12766 | Intellectual PropertyNorthern Subregional 2013NWRRC 2013 | |
| #12767 | JNorthern Subregional 2013NWRRC 2013 | |
| #12768 | Kids in a Friendly ClassNorthern Subregional 2013NWRRC 2013 | |
| #12769 | Lonely MountainNorthern Subregional 2013NWRRC 2013 | |
| #12776 | FactoriesJOI Open Contest 2014 Day 1Interactive | |
| #12777 | Fortune Telling 2JOI Open Contest 2014 Day 1 | |
| #12778 | Space PirateJOI Open Contest 2014 Day 1 | |
| #12779 | Project of MigrationJOI Open Contest 2014 Day 2Output Only | |
| #12780 | PinballJOI Open Contest 2014 Day 2 | |
| #12781 | SecretJOI Open Contest 2014 Day 2Interactive | |
| #12785 | ArcheryIOI 2009 Day 1 | |
| #12786 | HiringIOI 2009 Day 1 | |
| #12787 | PoiIOI 2009 Day 1 | |
| #12788 | RaisinsIOI 2009 Day 1 | |
| #12789 | GarageIOI 2009 Day 2 | |
| #12790 | MechoIOI 2009 Day 2 | |
| #12791 | RegionsIOI 2009 Day 2Interactive | |
| #12792 | SalesmanIOI 2009 Day 2 | |
| #12800 | Little Q and Big IntegersPetrozavodsk Summer 2017 Day 1 | |