| #15301 | Challenge Matrix Multiplication II | |
| #15302 | Cutting Chocolate | |
| #15303 | Basic Counting Practice Problems | |
| #15304 | Diameter of a Tree | |
| #15305 | Doo Doo Doo | |
| #15306 | Challenge NPC II | |
| #15307 | Plus Xor | |
| #15308 | Random Shuffle | |
| #15309 | Dumb Problem II | |
| #15310 | Subrectangle Count | |
| #15311 | Parentheses and Swapping | |
| #15312 | Triangle Grid | |
| #15313 | Replacement | |
| #15327 | 游览计划WC 2008 | |
| #15328 | 窥孔密码WC 2008Output Only | |
| #15329 | 超能纸带机WC 2008 | |
| #15330 | 最短路问题WC 2009 | |
| #15331 | 语音识别WC 2009 | |
| #15332 | 优化设计WC 2009Output Only | |
| #15333 | Distance CodeNordic OI 2019Communication | |
| #15334 | Thieves and PrisonsNordic OI 2019 | |
| #15335 | Graph OrderingNordic OI 2019 | |
| #15336 | Apple DeliveryNordic OI 2020 | |
| #15337 | BricksNordic OI 2020 | |
| #15338 | Christmas GiftsNordic OI 2020 | |
| #15339 | 友好的生物WC 2005 | |
| #15340 | 双面棋盘WC 2005 | |
| #15341 | 蜂窝玉米WC 2005Output Only | |
| #15342 | 找规律CCPC Chongqing 2025 (Warm up)Meme Task | |
| #15343 | 动态的果子合并CCPC Chongqing 2025 (Warm up) | |
| #15344 | 棕榈岛CCPC Chongqing 2025 (Warm up) | |
| #15345 | 总司令！不可以！CCPC Chongqing 2025 (Warm up) | |
| #15346 | Thanks, TuSimple!ZJUPC 2019 | |
| #15347 | Even Number TheoryZJUPC 2019 | |
| #15348 | Robot Cleaner IZJUPC 2019 | |
| #15349 | Robot Cleaner IIZJUPC 2019 | |
| #15350 | PotionZJUPC 2019 | |
| #15351 | Strange FunctionZJUPC 2019 | |
| #15352 | PostmanZJUPC 2019 | |
| #15353 | Rescue the PrincessZJUPC 2019 | |
| #15354 | Defense PlanZJUPC 2019 | |
| #15355 | Extended Twin Composite NumberZJUPC 2019Shandong Provincial 2019 (Warm up) | |
| #15356 | Passing NotesCommunication | |
| #15357 | The Lone Gladiator | |
| #15358 | PiratesAIPO 2017 Final | |
| #15359 | Password checkAIPO 2017 Final | |
| #15360 | Paint bucketAIPO 2017 Final | |
| #15361 | Counting pathsAIPO 2017 Final | |
| #15362 | KnightAIPO 2017 Final | |
| #15363 | TilingAIPO 2017 Final | |
| #15364 | DebugAIPO 2017 Final | |
| #15365 | Boom!AIPO 2017 Final | |
| #15366 | 异或运算THOI 2015 | |
| #15367 | 平方运算THOI 2015 | |
| #15368 | 解密运算THOI 2015 | |
| #15369 | 基因突变问题FJOI 2017 Day 1 | |
| #15370 | 最大非质数相关子集问题FJOI 2017 Day 1 | |
| #15371 | 魔术师问题FJOI 2017 Day 1 | |
| #15375 | RimaCOCI 2025/2026 Contest #1 | |
| #15376 | KrugometCOCI 2025/2026 Contest #1 | |
| #15377 | HarmonijaCOCI 2025/2026 Contest #1 | |
| #15378 | KraljicaCOCI 2025/2026 Contest #1 | |
| #15379 | ZagiCOCI 2025/2026 Contest #1 | |
| #15380 | MinesweeperCOCI 2025/2026 Contest #2 | |
| #15381 | DodatnaCOCI 2025/2026 Contest #2 | |
| #15382 | NatjecanjeCOCI 2025/2026 Contest #2 | |
| #15383 | RastućiCOCI 2025/2026 Contest #2 | |
| #15384 | TornjeviCOCI 2025/2026 Contest #2 | |
| #15390 | 有马加奈Ynoi 2019 Easy Round | |
| #15391 | 黑川赤音Ynoi 2019 Easy Round | |
| #15392 | 神木辉Ynoi 2019 Easy Round | |
| #15393 | ASCII Art ContestTaichung Regional 2025 | |
| #15394 | BusesTaichung Regional 2025 | |
| #15395 | Circles Are Far from Each OtherTaichung Regional 2025 | |
| #15396 | Divisor Card GameTaichung Regional 2025 | |
| #15397 | Number MazeTaichung Regional 2025 | |
| #15398 | Cluster Computing SystemTaichung Regional 2025 | |
| #15399 | Gene EditorTaichung Regional 2025 | |
| #15400 | Shuffling Cards with Problem Solver 68!Taichung Regional 2025 | |