| #3301 | Economic One-way RoadsXXI Open Cup | |
| #3302 | Just MeetingXXI Open Cup | |
| #3303 | ChemistryXXI Open Cup | |
| #3304 | Interval GraphXXI Open Cup | |
| #3305 | LCS 8XXI Open Cup | |
| #3306 | AlchemyXXI Open Cup | |
| #3307 | Query on a Tree 17XXI Open Cup | |
| #3308 | Remote ControlXXI Open Cup | |
| #3309 | Sewing GraphXXI Open Cup | |
| #3310 | Steel Slicing 2XXI Open Cup | |
| #3311 | Digits Are Not Just CharactersYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3312 | Arithmetic ProgressionsYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3313 | Emergency EvacuationYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3314 | Shortest Common Non-SubsequenceYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3315 | Eulerian Flight TourYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3316 | Fair Chocolate-CuttingYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3317 | What Goes Up Must Come DownYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3318 | Four-ColoringYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3319 | RanksYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3320 | Colorful TreeYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3321 | Sixth SenseYokohama Regional 2018Petrozavodsk Winter 2019 Day 3 | |
| #3322 | Array of DiscordNCPC 2020 | |
| #3323 | Coin StacksNCPC 2020 | |
| #3324 | Joining FlowsNCPC 2020 | |
| #3325 | Methodic MultiplicationNCPC 2020 | |
| #3326 | Help Chelsea!IDI Open 2007 | |
| #3327 | VirusIDI Open 2007 | |
| #3328 | FroggerIDI Open 2007 | |
| #3329 | ConquistadorIDI Open 2007 | |
| #3330 | PartyIDI Open 2007 | |
| #3331 | Save the Computer!IDI Open 2007 | |
| #3332 | Frigde of Your DreamsIDI Open 2007 | |
| #3333 | Scorched EarthIDI Open 2007 | |
| #3334 | Free WillyIDI Open 2007 | |
| #3335 | VampireIDI Open 2008 | |
| #3336 | TV BattleIDI Open 2008 | |
| #3337 | The Nutty ProfessorIDI Open 2008 | |
| #3338 | Tree of PainIDI Open 2008 | |
| #3339 | Eight PuzzleIDI Open 2008 | |
| #3340 | The Traveling OrienteererIDI Open 2008 | |
| #3341 | PaperIDI Open 2008 | |
| #3342 | The Still Embarrassed CryptographerIDI Open 2008 | |
| #3343 | Traffic LoadIDI Open 2008 | |
| #3344 | Letter CookiesIDI Open 2009 | |
| #3345 | Bicycle PuzzleIDI Open 2009 | |
| #3346 | Geometry DartsIDI Open 2009 | |
| #3347 | Box BettingIDI Open 2009 | |
| #3348 | Communication ChannelsIDI Open 2009 | |
| #3349 | Train TicketsIDI Open 2009 | |
| #3350 | Counting SheepIDI Open 2009 | |
| #3351 | Rubiks CubeIDI Open 2009 | |
| #3352 | Marble MadnessIDI Open 2009 | |
| #3353 | RobberiesIDI Open 2009 | |
| #3354 | Robot EncryptionIDI Open 2009 | |
| #3355 | Guarding the BorderIDI Open 2010 | |
| #3356 | Beehive EpidemicIDI Open 2010 | |
| #3357 | Mobile GamingIDI Open 2010 | |
| #3358 | Balancing WeightsIDI Open 2010 | |
| #3359 | Ambulance AnticsIDI Open 2010 | |
| #3360 | NurikabeIDI Open 2010 | |
| #3361 | Cookie MonsterIDI Open 2010 | |
| #3362 | Typing MonkeyIDI Open 2010 | |
| #3363 | The Diligent CryptographerIDI Open 2010 | |
| #3364 | Combat OddsIDI Open 2010 | |
| #3365 | SoundexIDI Open 2011 | |
| #3366 | Sheep FrenzyIDI Open 2011 | |
| #3367 | LOLIDI Open 2011 | |
| #3368 | Treasure HuntIDI Open 2011 | |
| #3369 | Cross Country RaceIDI Open 2011 | |
| #3370 | BeadsIDI Open 2011 | |
| #3371 | Sleeping at WorkIDI Open 2011 | |
| #3372 | Is it a NumberIDI Open 2011 | |
| #3373 | Proud PenguinIDI Open 2011 | |
| #3374 | Travelling TomIDI Open 2011 | |
| #3375 | Boss RushIDI Open 2012 | |
| #3376 | Decode the MessageIDI Open 2012 | |
| #3377 | Troublesome ToolsIDI Open 2012 | |
| #3378 | CivilizationIDI Open 2012 | |
| #3379 | Inverse Divisor SumsIDI Open 2012 | |
| #3380 | Longest Common PathIDI Open 2012 | |
| #3381 | Birthday PartyIDI Open 2012 | |
| #3382 | Holey RoadIDI Open 2012 | |
| #3383 | Candy StoreIDI Open 2012 | |
| #3384 | Rotating Penguin MazeIDI Open 2012 | |
| #3385 | Angry Grammar NaziIDI Open 2013 | |
| #3386 | Neurotic NetworkIDI Open 2013 | |
| #3387 | Special ServicesIDI Open 2013 | |
| #3388 | Negative People in Da HouseIDI Open 2013 | |
| #3389 | Ruben SpawnsIDI Open 2013 | |
| #3390 | Kings on a ChessboardIDI Open 2013 | |
| #3391 | Traveling CellspersonIDI Open 2013 | |
| #3392 | DimensionsIDI Open 2013Unavailable | |
| #3393 | Space TravelIDI Open 2013 | |
| #3394 | C.S.I.: P15IDI Open 2013 | |
| #3395 | 数表SDOI 2014 Round 1 Day 1 | |
| #3396 | 数数SDOI 2014 Round 1 Day 1 | |
| #3397 | 旅行SDOI 2014 Round 1 Day 1 | |
| #3398 | LISSDOI 2014 Round 1 Day 2 | |
| #3399 | 向量集SDOI 2014 Round 1 Day 2 | |
| #3400 | 重建SDOI 2014 Round 1 Day 2 | |