| #3001 | Piece of CakeNAIPC 2019 | |
| #3002 | Busy BoardNAIPC 2019 | |
| #3003 | Cost of LivingNAIPC 2019 | |
| #3004 | It's a Mod, Mod, Mod, Mod WorldNAIPC 2019 | |
| #3005 | MonotonyNAIPC 2019 | |
| #3006 | Heaps of FunNAIPC 2019 | |
| #3007 | Intersecting RectanglesNAIPC 2019 | |
| #3008 | Rocket Powered HovercraftNAIPC 2019 | |
| #3009 | Cutting StringsNAIPC 2019 | |
| #3010 | Subsequences in SubstringsNAIPC 2019 | |
| #3011 | Knight of the Tarot CardsNAIPC 2019 | |
| #3012 | Planes, Trains, but not AutomobilesNAIPC 2019 | |
| #3013 | XOR SequencesNAIPC 2019 | |
| #3014 | Cut it Out!NAIPC 2018 | |
| #3015 | Double CliqueNAIPC 2018 | |
| #3016 | Flashing FluorescentsNAIPC 2018 | |
| #3017 | Missing GnomesNAIPC 2018 | |
| #3018 | Prefix Free CodeNAIPC 2018 | |
| #3019 | Probe DroidsNAIPC 2018 | |
| #3020 | Rainbow GraphNAIPC 2018 | |
| #3021 | RecoveryNAIPC 2018 | |
| #3022 | Red Black TreeNAIPC 2018 | |
| #3023 | Winter FestivalNAIPC 2018 | |
| #3024 | Zoning HousesNAIPC 2018 | |
| #3025 | AssimilationAMPPZ 2019 | |
| #3026 | Little WormAMPPZ 2019 | |
| #3027 | PolygonAMPPZ 2019 | |
| #3028 | FrogsAMPPZ 2019 | |
| #3029 | The Great Drone ShowAMPPZ 2019 | |
| #3030 | Fantastic CompressionAMPPZ 2019 | |
| #3031 | BookstoreAMPPZ 2019 | |
| #3032 | Cheese GameAMPPZ 2019 | |
| #3033 | Harry Potter and the Palindromic RadiusAMPPZ 2019 | |
| #3034 | AntennasAMPPZ 2019 | |
| #3035 | GhostAMPPZ 2019 | |
| #3036 | DonutsAMPPZ 2019 | |
| #3037 | 6789XX Open CupOpen Cup | |
| #3038 | Bigger Sokoban 40kXX Open CupOpen Cup | |
| #3039 | CleaningXX Open CupOpen Cup | |
| #3040 | ContainerOpen CupXX Open Cup | |
| #3041 | Dead Cacti SocietyOpen CupXX Open Cup | |
| #3042 | Hilbert's HotelOpen CupXX Open Cup | |
| #3043 | Lexicographically Minimum WalkOpen CupXX Open Cup | |
| #3044 | MaximizerOpen CupXX Open Cup | |
| #3045 | Minimum Diameter Spanning TreeOpen CupXX Open Cup | |
| #3046 | ParklifeOpen CupXX Open Cup | |
| #3047 | Wind of Change点分治数据结构Open CupXX Open Cup | |
| #3048 | Where is the BoundaryOpen CupXVI Open Cup | |
| #3049 | Vector FieldOpen CupXVI Open Cup | |
| #3050 | Kuru Kuru SushiOpen CupXVI Open Cup | |
| #3051 | Identity FunctionOpen CupXVI Open Cup | |
| #3052 | Enclose PointsOpen CupXVI Open Cup | |
| #3053 | Marching CourseOpen CupXVI Open Cup | |
| #3054 | Surface Area of CubesOpen CupXVI Open Cup | |
| #3055 | Laser CutterOpen CupXVI Open Cup | |
| #3056 | Live ProgrammingOpen CupXVI Open Cup | |
| #3057 | Black CompanyOpen CupXVI Open Cup | |
| #3058 | Assignment Algorithm模拟XVIII Open CupOpen Cup | |
| #3059 | Buffalo Barricades扫描线XVIII Open CupOpen Cup | |
| #3060 | Cumulative Code分类讨论Ad HocXVIII Open CupOpen Cup | |
| #3061 | Donut DroneAd HocXVIII Open CupOpen Cup | |
| #3062 | Embedding Enumeration动态规划组合计数XVIII Open CupOpen Cup | |
| #3063 | Faulty Factorial数论XVIII Open CupOpen Cup | |
| #3064 | Gambling Guide概率图论最短路XVIII Open CupOpen Cup | |
| #3065 | Hidden Hierarchy模拟XVIII Open CupOpen Cup | |
| #3066 | Intrinsic Interval整体二分XVIII Open CupOpen Cup | |
| #3067 | Justified Jungle树Ad HocXVIII Open CupOpen Cup | |
| #3068 | Kitchen Knobs动态规划贪心XVIII Open CupOpen Cup | |
| #3069 | Lunar Landscape扫描线XVIII Open CupOpen Cup | |
| #3070 | Alien invadersOpen CupXV Open Cup | |
| #3071 | BioengineeringOpen CupXV Open Cup | |
| #3072 | City of Eternal FestivitiesOpen CupXV Open Cup | |
| #3073 | DictionaryOpen CupXV Open Cup | |
| #3074 | Express As The SumOpen CupXV Open Cup | |
| #3075 | FactoryOpen CupXV Open Cup | |
| #3076 | Game 2048Open CupXV Open Cup | |
| #3077 | How to Deal With ImpOpen CupXV Open Cup | |
| #3078 | Infrastructure and CommitteesOpen CupXV Open Cup | |
| #3079 | Joining The Bricks TogetherOpen CupXV Open Cup | |
| #3080 | Keyboard TroublesOpen CupXV Open Cup | |
| #3081 | LandscapeOpen CupXV Open Cup | |
| #3082 | Ascending Matrix | |
| #3083 | Bit Operation | |
| #3084 | Count Min Ratio | |
| #3085 | Do Use FFT | |
| #3086 | Edge Subsets | |
| #3087 | Find the LCA | |
| #3088 | Games | |
| #3089 | Harsh Comments | |
| #3090 | Inverse Problem | |
| #3091 | Japanese Knowledge | |
| #3092 | AerobaticsJOISC 2021 Day 1Output Only | |
| #3093 | IOI FeverJOISC 2021 Day 1 | |
| #3094 | Food CourtJOISC 2021 Day 1 | |
| #3095 | Escape RouteJOISC 2021 Day 2Interactive | |
| #3096 | Road ConstructionJOISC 2021 Day 2 | |
| #3097 | ShoppingJOISC 2021 Day 2Communication | |
| #3098 | Ancient MachineJOISC 2021 Day 3Communication | |
| #3099 | BodyguardJOISC 2021 Day 3 | |
| #3100 | Meetings 2JOISC 2021 Day 3 | |