| #4901 | Speike & Tom2021 集训队互测 Round 5 | |
| #4902 | 聚会2021 集训队互测 Round 5 | |
| #4903 | 细菌2021 集训队互测 Round 5 | |
| #4904 | 圆滚滚的算术占卜2021 集训队互测 Round 6 | |
| #4905 | 交朋友2021 集训队互测 Round 6Output Only | |
| #4906 | 球球2021 集训队互测 Round 6 | |
| #4907 | djq 学生物2021 集训队互测 Round 7 | |
| #4908 | 完全表示2021 集训队互测 Round 7 | |
| #4909 | 《关于因为与去年互测zjk撞题而不得不改题这回事》2021 集训队互测 Round 7 | |
| #4910 | Numbers2021 集训队互测 Round 8 | |
| #4911 | 造数据2021 集训队互测 Round 8 | |
| #4912 | WereYouLast2021 集训队互测 Round 8Communication | |
| #4913 | 子集匹配2021 集训队互测 Round 9Interactive | |
| #4914 | Slight Hope2021 集训队互测 Round 9 | |
| #4915 | 海胆2021 集训队互测 Round 9Ynoi 2003 | |
| #4916 | 抽奖机2021 集训队互测 Round 10 | |
| #4917 | 中奖率2021 集训队互测 Round 10 | |
| #4918 | 染色2021 集训队互测 Round 10 | |
| #4919 | Tree2021 集训队互测 Round 11Interactive | |
| #4920 | 挑战分解质因数2021 集训队互测 Round 11 | |
| #4921 | 匹配计数2021 集训队互测 Round 11 | |
| #4922 | 生活在对角线下2021 集训队互测 Round 12 | |
| #4923 | 整数2021 集训队互测 Round 12Interactive | |
| #4924 | 蜘蛛爬树2021 集训队互测 Round 12 | |
| #4925 | Adjacent PairseJOI 2022 Day 1 | |
| #4926 | Where Is the Root?eJOI 2022 Day 1Interactive | |
| #4927 | Bounded Spanning TreeeJOI 2022 Day 1 | |
| #4928 | Game With NumberseJOI 2022 Day 2 | |
| #4929 | Longest Unfriendly SubsequenceeJOI 2022 Day 2 | |
| #4930 | LCS of PermutationseJOI 2022 Day 2 | |
| #4931 | Comic BingeJakarta Regional 2020 | |
| #4932 | Moon and SunJakarta Regional 2020 | |
| #4933 | Cul-De-Sac ParadesJakarta Regional 2020 | |
| #4934 | Forbidden CardJakarta Regional 2020 | |
| #4935 | Exchange BottleneckJakarta Regional 2020 | |
| #4936 | Shopping ChangesJakarta Regional 2020 | |
| #4937 | Permutation TransformationJakarta Regional 2020 | |
| #4938 | Writing TasksJakarta Regional 2020 | |
| #4939 | Red Black BallJakarta Regional 2020 | |
| #4940 | Token DistanceJakarta Regional 2020 | |
| #4941 | Tree BeautyJakarta Regional 2020 | |
| #4942 | Robust DefenseJakarta Regional 2020 | |
| #4943 | Police StationsJakarta Regional 2020 | |
| #4944 | 假面CTSC 2018CTS 2018 | |
| #4945 | 暴力写挂CTSC 2018CTS 2018 | |
| #4946 | 青蕈领主CTSC 2018CTS 2018 | |
| #4947 | 混合果汁CTSC 2018CTS 2018 | |
| #4948 | 字典树CTSC 2018CTS 2018 | |
| #4949 | 组合数问题CTSC 2018CTS 2018Output Only | |
| #4950 | Finding Maximal Non-Trivial MonotonesBrazil Subregional 2022 | |
| #4951 | Fun with StonesBrazil Subregional 2022 | |
| #4952 | Cutting with LasersBrazil Subregional 2022 | |
| #4953 | Displacing ParticlesBrazil Subregional 2022 | |
| #4954 | Eliminating BallonsBrazil Subregional 2022 | |
| #4955 | Multidimensional HangmanBrazil Subregional 2022 | |
| #4956 | Geometry of TrianglesBrazil Subregional 2022 | |
| #4957 | Helping the TransitBrazil Subregional 2022 | |
| #4958 | Intercepting InformationBrazil Subregional 2022 | |
| #4959 | Playing 23Brazil Subregional 2022 | |
| #4960 | Kalel, the Jumping FrogBrazil Subregional 2022 | |
| #4961 | Listing Tedious PathsBrazil Subregional 2022 | |
| #4962 | Hopscotch MarathonBrazil Subregional 2022 | |
| #4963 | Numbers on both SidesBrazil Subregional 2022 | |
| #4964 | Easy-to-Solve Expressions University of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4965 | Easy-to-Pronounce WordsUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4966 | Decimal XORUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4967 | Square Fishing NetUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4968 | AqualinUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4969 | RCV SimplificationUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4970 | Panda Hunting Treasure BoxUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4971 | Lecture AllocationUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4972 | Stone SmoothingUniversity of Central Florida 2022 Local Programming Contest (Qualifying Round) | |
| #4984 | 集合划分Code+ 8 初赛 | |
| #4985 | 打怪游戏Code+ 8 初赛 | |
| #4986 | 普勒亚Code+ 8 初赛 | |
| #4987 | 图Code+ 8 初赛 | |
| #4988 | Ace ArbiterNCPC 2022 | |
| #4989 | Berry BattleNCPC 2022 | |
| #4990 | Coffee Cup ComboNCPC 2022 | |
| #4991 | Disc DistrictNCPC 2022 | |
| #4992 | Enigmatic EnumerationNCPC 2022 | |
| #4993 | Foreign FootballNCPC 2022 | |
| #4994 | Graduation GuaranteeNCPC 2022 | |
| #4995 | Highest HillNCPC 2022 | |
| #4996 | Icy ItineraryNCPC 2022 | |
| #4997 | Junk JourneyNCPC 2022 | |
| #4998 | Keyboard QueriesNCPC 2022 | |
| #4999 | AibohphobiATaiwan Online Programming Contest 2022 | |
| #5000 | Balanced Seesaw ArrayTaiwan Online Programming Contest 2022 | |