| #20001 | Potential Well | |
| #20002 | Steiner Tree in Random Graph | |
| #20003 | Rotation Transformation | |
| #20004 | Arithmetic Progression | |
| #20005 | Binary Tandem | |
| #20006 | Counting Paths | |
| #20007 | Dota Limit | |
| #20008 | Exactly X Pairs | |
| #20009 | Fastest Sort | |
| #20010 | Great Pairs | |
| #20011 | Hamiltonian-ish Path | |
| #20012 | Independent Cuts | |
| #20013 | Joy of Geometry | |
| #20014 | K Segments | |
| #20015 | L2 Norm | |
| #20016 | Recall | |
| #20017 | Mod | |
| #20018 | Permutation Inversions | |
| #20019 | Sequence | |
| #20020 | LCM Permutation | |
| #20021 | 50 Years of Excellence | |
| #20022 | Toll Gates on a Tight Schedule | |
| #20023 | The First Problem | |
| #20024 | A Lamp of Moon | |
| #20025 | String | |
| #20026 | Wolf Game | |
| #20027 | Longest Common Prefix | |
| #20028 | Check In | |
| #20029 | Red Sequence | |
| #20030 | Alchemy 101 | |
| #20031 | Beautiful Square | |
| #20032 | Can Tho Expressway | |
| #20033 | Div 2, Mul 2, Mul 3 | |
| #20034 | Edge Removal | |
| #20035 | Final Exam | |
| #20036 | Greatest Permutation | |
| #20037 | Hexagon coloring | |
| #20038 | Intelligence Exchange | |
| #20039 | Juggling Sequence | |
| #20040 | Kingdom of Hamsters | |
| #20041 | Lazy Students | |
| #20042 | Milk Tea Battle | |
| #20051 | And Revive The Melody | |
| #20052 | Break The Speakers | |
| #20053 | Cryptarithm | |
| #20054 | Don't Fight The Music | |
| #20055 | Ether Strike | |
| #20056 | False Amber | |
| #20057 | Gungnir Fracture | |
| #20058 | Hydra | |
| #20059 | Incyde | |
| #20060 | Journey | |
| #20061 | Kikai No Tsubasa | |
| #20062 | Lucid Traveler | |
| #20063 | Melodiniq | |
| #20065 | Kikai No Tsubasa 2 | |
| #20075 | Ascending Random Number SequenceGuangxi Provincial 2024 | |
| #20076 | Black FridayGuangxi Provincial 2024 | |
| #20077 | Finding Cyclic IsomorphismGuangxi Provincial 2024 | |
| #20078 | DuneGuangxi Provincial 2024 | |
| #20079 | Epsilon EstuaryGuangxi Provincial 2024 | |
| #20080 | Farewell GXCPC!Guangxi Provincial 2024 | |
| #20081 | Grand XOR Counting Problem ChallengeGuangxi Provincial 2024 | |
| #20082 | Hashing CollisionGuangxi Provincial 2024 | |
| #20083 | Ice SkatingGuangxi Provincial 2024 | |
| #20084 | Judge System with RandomGuangxi Provincial 2024 | |
| #20085 | Kingdom Rush: VengeanceGuangxi Provincial 2024 | |
| #20086 | LoongGuangxi Provincial 2024 | |
| #20087 | Matching on a TreeGuangxi Provincial 2024 | |
| #20088 | Abstract PaintingDa Nang Regional 2019 | |
| #20089 | Banana ProblemDa Nang Regional 2019 | |
| #20090 | Counting PalindromesDa Nang Regional 2019 | |
| #20091 | Dating timeDa Nang Regional 2019 | |
| #20092 | Easy QueryDa Nang Regional 2019 | |
| #20093 | Fair Bandwidth SharingDa Nang Regional 2019 | |
| #20094 | Generating NumbersDa Nang Regional 2019 | |
| #20095 | HanjieDa Nang Regional 2019 | |
| #20096 | Inspecting IlluminationDa Nang Regional 2019 | |
| #20097 | Justice for AntsDa Nang Regional 2019 | |
| #20098 | Keep It SortedDa Nang Regional 2019 | |
| #20099 | Latin SquareDa Nang Regional 2019 | |
| #20100 | Moscow DreamDa Nang Regional 2019 | |