| #1253 | Abstract Circular CoverPetrozavodsk Summer 2020 Day 2 | |
| #1263 | Keep It CoolPetrozavodsk Summer 2020 Day 2 | |
| #1649 | Simple HullSEERC 2020 | |
| #1790 | 机器人游戏NOI 2021 | |
| #1814 | Kingdoms and QuarantinePetrozavodsk Summer 2021 Day 1 | |
| #2070 | Heavy StonesPetrozavodsk Winter 2020 Day 9Yuhao Du Contest | |
| #2130 | Fiolki 2 [A]PA 2021 | |
| #2214 | Link Cut DigraphPetrozavodsk Summer 2018 Day 8Yuhao Du Contest | |
| #2429 | Conquer The WorldWorld Finals 2018 | |
| #2495 | Knight's MoveGP of Urals | |
| #2550 | Lion and ZebraPetrozavodsk Winter 2022 Day 1 | |
| #2631 | Sandcastle 2JOI 2021/2022JOI 2021/2022 | |
| #2835 | Number TheoryCCPC Final 2020 | |
| #3091 | Japanese Knowledge | |
| #4208 | Flight to the FordBaltic OI 2022 Day 2Communication | |
| #4273 | Good GameCCO 2022 Day 2 | |
| #4562 | Prisoner ChallengeIOI 2022 Day 1 | |
| #4565 | Rarest InsectsIOI 2022 Day 2Interactive | |
| #4566 | Thousands IslandsIOI 2022 Day 2 | |
| #4791 | MoviesPetrozavodsk Summer 2017 Day 2 | |
| #4823 | No!Petrozavodsk Summer 2022 Day 3 | |
| #4886 | Best SunPetrozavodsk Summer 2022 Day 7 | |
| #5076 | Prof. Pang and AntsEC-Final 2021 | |
| #5092 | 森林游戏集训队互测 2022 Round 9 | |
| #5145 | Shortest PathJinan Regional 2022 | |
| #5241 | Miny [A]PA 2022 Runda 4 | |
| #5421 | Factories Once MoreNanjing Regional 2022 | |
| #5425 | Proposition CompositionNanjing Regional 2022 | |
| #5450 | 比赛CTS 2023 Day 2WC 2023 | |
| #5463 | Range Closest Pair of Points QueryHong Kong Regional 2022Ynoi 2002 | |
| #6196 | Minimum Element ProblemOsijek Competitive Programming Camp Winter 2023 Day 6Yuhao Du Contest | |
| #6304 | RectangleEC-Final 2022 | |
| #6350 | MITPetrozavodsk Winter 2023 Day 6 | |
| #6413 | Classical Graph Theory ProblemPetrozavodsk Winter 2023 Day 7 | |
| #6507 | Recover the StringCCPC Final 2022 | |
| #6509 | Not Another Range Query ProblemCCPC Final 2022 | |
| #6661 | 야유회KOI TST 2023 Day 1Communication | |
| #6673 | Be Careful 2Shandong Provincial 2023 | |
| #6797 | An Unsure CatchMoscow Pre-Finals Workshop 2020 Day 5 | |
| #6846 | Wiring EngineeringCCPC Guilin 2021 | |
| #7008 | Rikka with Nice Counting Striking BackXuzhou Regional 2018 | |
| #7012 | Rikka with An Unnamed TempleXuzhou Regional 2018 | |
| #7121 | Beech TreeIOI 2023 Day 2 | |
| #7309 | Compressed LCSICPCCamp 2017 Day 1Petrozavodsk Winter 2017 Day 2 | |
| #7419 | Jiry MatchingsPetrozavodsk Summer 2019 Day 2300iq Contest 2 | |
| #7455 | stcmYnoi 2008 | |
| #7632 | Balanced ArraysUniversal Cup | |
| #7636 | Fair ElectionsUniversal Cup | |
| #7677 | Easy Diameter Problem | |
| #7742 | Suffix StructureNanjing Regional 2023 | |
| #8007 | Egg Drop ChallengePetrozavodsk Summer 2023 Day 5 | |
| #8047 | DFS Order 4EC-Final 2023 | |
| #8053 | Flow 2EC-Final 2023 | |
| #8092 | InfernapePetrozavodsk Summer 2019 Day 5 | |
| #8109 | Postcards / PrzesyłPetrozavodsk Summer 2018 Day 5PA 2017 Final | |
| #8219 | 线段树CTS 2024 Day 1WC 2024 | |
| #8220 | 众生之门CTS 2024 Day 1 | |
| #8259 | Road Service 2JOI 2023/2024 | |
| #8306 | Boring ProblemMacau Regional 2020 | |
| #8546 | Min or Max 2CCPC Final 2023 | |
| #8553 | Exchanging KubicCCPC Final 2023Interactive | |
| #8642 | Spy 3JOISC 2024 Day 1JOIST 2024 Day 1Communication | |
| #8644 | Tricolor LightsJOISC 2024 Day 2JOIST 2024 Day 2Communication | |
| #8683 | Bridging the GapWorld Finals 2023World Finals 2022 | |
| #8722 | 卡牌游戏北京市赛 2024 | |
| #8772 | House DeconstructionNAC 2024 | |
| #8820 | Exchanging Kubic 2The 2nd Universal Cup Semifinals | |
| #8948 | 报复社会CTT 2022 Day 2 | |
| #8956 | 欧拉？欧拉！CTT 2022 Day 4 | |
| #9030 | 泡泡糖 | |
| #9047 | Knights of NightShanghai Regional 2024 | |
| #9189 | Make them MeetEGOI 2024 Day 2 | |
| #9238 | TreeIOI 2024 Day 1 | |
| #9239 | HieroglyphsIOI 2024 Day 2 | |
| #9542 | Friendship is MagicChengdu Regional 2024 | |
| #9571 | Border Jump 2Nanjing Regional 2024 | |
| #9688 | 通信CTS 2025 Day 2Communication | |
| #9838 | Shuttle BusCCPC Final 2021 | |
| #9840 | Tree PartitionCCPC Final 2021 | |
| #9844 | Harie Programming ContestCCPC Final 2021 | |
| #9906 | 乘积的期望CTT 2024 Day 1 | |
| #10042 | SchedulingPetrozavodsk Summer 2024 Day 5 | |
| #10105 | Circular ParterreThe 2nd Universal Cup Finals | |
| #10185 | 뗏목 제작KOI TST 2025 Day 2 | |
| #10243 | Opieka [A]PA 2025 Runda 3 | |
| #10297 | FloodingNOI 2025 Final | |
| #10309 | 阿尔塔尔CTT 2023 Day 4Interactive | |
| #11105 | Requiem for QingyuCCPC Final 2024 | |
| #11219 | FerryCCPC Final 2019 | |
| #12322 | Alien InvasionPetrozavodsk Winter 2019 Day 6Interactive | |
| #14022 | EthanolThe 3rd Universal Cup Semifinals | |
| #14023 | International Olympiad in FishingThe 3rd Universal Cup Semifinals | |
| #14435 | Yet Another Constructive Problem | |
| #17201 | 猫和老鼠CTS 2026 Day 1 | |
| #18009 | Not a Work of Idol 2CCPC Final 2025 | |
| #18204 | Sticks 2The 3rd Universal Cup Finals | |