| #901 | 石子移动 | |
| #902 | 分数排序 | |
| #903 | 彼岸蔷薇 | |
| #907 | 万花筒 | |
| #908 | 哈密顿环 | |
| #909 | 数点 | |
| #910 | 精shèn细腻 | |
| #911 | 答案补全 | |
| #912 | 对角线 | |
| #913 | 蝴蝶图 | |
| #914 | 分身术 | |
| #937 | Wakacje BajtazaraXXVII Olimpiada Informatyczna – II etapPOI 2019/2020 Stage 2 | |
| #938 | Drzewo czwórkoweXXVII Olimpiada Informatyczna – II etapPOI 2019/2020 Stage 2 | |
| #939 | Wielki UpadekXXVII Olimpiada Informatyczna – II etapPOI 2019/2020 Stage 2 | |
| #940 | Marudny BajtazarXXVII Olimpiada Informatyczna – II etapPOI 2019/2020 Stage 2 | |
| #941 | Trudny dylemat przedszkolaninaXXVII Olimpiada Informatyczna – II etapPOI 2019/2020 Stage 2 | |
| #942 | Building SkyscrapersCEOI 2019 | |
| #943 | Dynamic DiameterCEOI 2019 | |
| #944 | CubewordCEOI 2019 | |
| #945 | Amusement ParkCEOI 2019 | |
| #946 | Magic TreeCEOI 2019 | |
| #947 | Scissors and TapeCEOI 2019 | |
| #948 | Fancy FenceCEOI 2020 | |
| #949 | RoadsCEOI 2020 | |
| #950 | Star TrekCEOI 2020 | |
| #951 | The Potion of Great PowerCEOI 2020Interactive | |
| #952 | Spring cleaningCEOI 2020 | |
| #953 | Chess RushCEOI 2020 | |
| #956 | 后缀排序模板题 | |
| #957 | Assignment ProblemPetrozavodsk Winter 2021 Day 5 | |
| #958 | Lockout vs touristPetrozavodsk Winter 2021 Day 5 | |
| #959 | Multiple?Petrozavodsk Winter 2021 Day 5 | |
| #960 | Output Limit ExceededPetrozavodsk Winter 2021 Day 5 | |
| #961 | Smol Vertex CoverPetrozavodsk Winter 2021 Day 5 | |
| #962 | Thanks to MikeMirzayanovPetrozavodsk Winter 2021 Day 5 | |
| #963 | Remove the PrimePetrozavodsk Winter 2021 Day 5 | |
| #964 | Excluded MinPetrozavodsk Winter 2021 Day 5 | |
| #965 | TradePetrozavodsk Winter 2021 Day 5 | |
| #966 | Increasing or DecreasingPetrozavodsk Winter 2021 Day 5 | |
| #967 | Rectangle PaintingPetrozavodsk Winter 2021 Day 5 | |
| #968 | Extreme WealthPetrozavodsk Winter 2021 Day 5 | |
| #969 | Discrete Logarithm is a JokePetrozavodsk Winter 2021 Day 5 | |
| #970 | Best SubsequencePetrozavodsk Winter 2021 Day 6 | |
| #971 | Binary Search TreePetrozavodsk Winter 2021 Day 6 | |
| #972 | CirclePetrozavodsk Winter 2021 Day 6 | |
| #973 | Composite SequencePetrozavodsk Winter 2021 Day 6 | |
| #974 | Four XORPetrozavodsk Winter 2021 Day 6 | |
| #975 | GamePetrozavodsk Winter 2021 Day 6 | |
| #976 | GPAPetrozavodsk Winter 2021 Day 6 | |
| #977 | Local MaximaPetrozavodsk Winter 2021 Day 6 | |
| #978 | Maximum SubsequencePetrozavodsk Winter 2021 Day 6 | |
| #979 | MinerPetrozavodsk Winter 2021 Day 6 | |
| #980 | New Financial YearPetrozavodsk Winter 2021 Day 7 | |
| #981 | One More Problem About DFTPetrozavodsk Winter 2021 Day 7 | |
| #982 | RobotPetrozavodsk Winter 2021 Day 7 | |
| #983 | The Hash TablePetrozavodsk Winter 2021 Day 7 | |
| #984 | HappinessPetrozavodsk Winter 2021 Day 7 | |
| #985 | Attractions On PlanePetrozavodsk Winter 2021 Day 7 | |
| #986 | Measuring WAC-nessPetrozavodsk Winter 2021 Day 7 | |
| #987 | Easter GiftPetrozavodsk Winter 2021 Day 7 | |
| #988 | Returning Lights To BoxPetrozavodsk Winter 2021 Day 7 | |
| #989 | Into CactusPetrozavodsk Winter 2021 Day 7 | |
| #990 | Colorful ComponentsPetrozavodsk Winter 2021 Day 7 | |
| #991 | Almost Free FallingPetrozavodsk Winter 2021 Day 7 | |
| #992 | Number of Colorful MatchingsPetrozavodsk Winter 2021 Day 7 | |
| #993 | 100 Boxes Per Hour...Petrozavodsk Winter 2021 Day 7Interactive | |
| #994 | 区间逆序对 | |
| #995 | 桥模板题 | |
| #996 | 割点模板题 | |
| #998 | 矩阵归零 | |
| #999 | 边双连通分量 | |
| #1000 | 边三连通分量 | |