| #3401 | Assembling ServicesWuhan Regional 2009 | |
| #3402 | Box RelationsWuhan Regional 2009 | |
| #3403 | Crossing RiversWuhan Regional 2009 | |
| #3404 | Download ManagerWuhan Regional 2009 | |
| #3405 | Exclusive-ORWuhan Regional 2009 | |
| #3406 | Final CombatWuhan Regional 2009 | |
| #3407 | Gift HuntingWuhan Regional 2009 | |
| #3408 | Help BubuWuhan Regional 2009 | |
| #3409 | In A Crazy CityWuhan Regional 2009 | |
| #3410 | Jiajia's RobotWuhan Regional 2009 | |
| #3411 | Absurdistan RoadsNWERC 2013 | |
| #3412 | Battle for SilverNWERC 2013 | |
| #3413 | Card TrickNWERC 2013 | |
| #3414 | Diagrams & TableauxNWERC 2013 | |
| #3415 | Exponential TowersNWERC 2013 | |
| #3416 | First DateNWERC 2013 | |
| #3417 | GrachtenNWERC 2013 | |
| #3418 | Highway of the FutureNWERC 2013 | |
| #3419 | Infix to PrefixNWERC 2013 | |
| #3420 | Jingle BallsNWERC 2013 | |
| #3421 | Reversed Binary NumbersKTH Challenge 2011 | |
| #3422 | PaintballKTH Challenge 2011 | |
| #3423 | Base-2 PalindromesKTH Challenge 2011 | |
| #3424 | Kindergarten ExcursionKTH Challenge 2011 | |
| #3425 | Coast LengthKTH Challenge 2011 | |
| #3426 | Icons in the ToolbarKTH Challenge 2011 | |
| #3427 | Getting Rid of CoinsKTH Challenge 2011 | |
| #3428 | Spam FilterKTH Challenge 2012 | |
| #3429 | Birds on a WireKTH Challenge 2012 | |
| #3430 | Lifting WallsKTH Challenge 2012 | |
| #3431 | Toilet SeatKTH Challenge 2012 | |
| #3432 | Pub-lic GoodKTH Challenge 2012 | |
| #3433 | Xor MaximizationKTH Challenge 2012 | |
| #3434 | Restaurant OrdersKTH Challenge 2012 | |
| #3435 | Three DigitsKTH Challenge 2012 | |
| #3436 | Car GameKTH Challenge 2013 | |
| #3437 | PeragramsKTH Challenge 2013 | |
| #3438 | Vacuum TubesKTH Challenge 2013 | |
| #3439 | Chicken JoggersKTH Challenge 2013 | |
| #3440 | HogwartsKTH Challenge 2013 | |
| #3441 | Bank QueueKTH Challenge 2013 | |
| #3442 | Forest HighwayKTH Challenge 2013 | |
| #3443 | FreeCellKTH Challenge 2013 | |
| #3444 | Flag QuizKTH Challenge 2013 | |
| #3445 | Numbers On a TreeKTH Challenge 2014 | |
| #3446 | Absurdistan Roads IIKTH Challenge 2014 | |
| #3447 | Cow CraneKTH Challenge 2014 | |
| #3448 | TomosynthesisKTH Challenge 2014 | |
| #3449 | Pizza ProblemsKTH Challenge 2014 | |
| #3450 | Falling MugsKTH Challenge 2014 | |
| #3451 | InterceptKTH Challenge 2014 | |
| #3452 | RadarKTH Challenge 2014 | |
| #3453 | Count von Walken's FenceKTH Challenge 2014 | |
| #3454 | ProteinsKTH Challenge 2015 | |
| #3455 | Black FridayKTH Challenge 2015 | |
| #3456 | Absurdistan Roads IIIKTH Challenge 2015 | |
| #3457 | XortrisKTH Challenge 2015 | |
| #3458 | Shibuya CrossingKTH Challenge 2015 | |
| #3459 | SpockKTH Challenge 2015Interactive | |
| #3460 | A1 PaperKTH Challenge 2015 | |
| #3461 | Odd Binomial CoefficientsKTH Challenge 2015 | |
| #3462 | The Addition GameKTH Challenge 2015 | |
| #3463 | IronmanKTH Challenge 2016 | |
| #3464 | Another Brick in the WallKTH Challenge 2016 | |
| #3465 | ZoningKTH Challenge 2016 | |
| #3466 | Dice BettingKTH Challenge 2016 | |
| #3467 | ClimbingKTH Challenge 2016 | |
| #3468 | Hay BalesKTH Challenge 2016 | |
| #3469 | RacetrackKTH Challenge 2016 | |
| #3470 | nnnnnKTH Challenge 2016 | |
| #3471 | Saturn BeesKTH Challenge 2017 | |
| #3472 | EvenOddKTH Challenge 2017 | |
| #3473 | IslandsKTH Challenge 2017 | |
| #3474 | House of CardsKTH Challenge 2017 | |
| #3475 | Global WarmingKTH Challenge 2017 | |
| #3476 | 3D Printed StatuesKTH Challenge 2017 | |
| #3477 | Restaurant BribesKTH Challenge 2017 | |
| #3478 | WolfKTH Challenge 2017 | |
| #3479 | Lights OutKTH Challenge 2017 | |
| #3480 | Bus PlanningKTH Challenge 2018 | |
| #3481 | CarsKTH Challenge 2018 | |
| #3482 | Color CodesKTH Challenge 2018 | |
| #3483 | #exclude<scoring>KTH Challenge 2018 | |
| #3484 | Mars WindowKTH Challenge 2018 | |
| #3485 | MathemagiciansKTH Challenge 2018 | |
| #3486 | Pairing SocksKTH Challenge 2018 | |
| #3487 | Tree HuggingKTH Challenge 2018 | |
| #3488 | AssassinsKTH Challenge 2019 | |
| #3489 | Espresso BucksKTH Challenge 2019 | |
| #3490 | Loo RollsKTH Challenge 2019 | |
| #3491 | Meow Factor 2KTH Challenge 2019 | |
| #3492 | Pea Soup and PancakesKTH Challenge 2019 | |
| #3493 | Ski LiftsKTH Challenge 2019 | |
| #3494 | Symmetric PolynomialsKTH Challenge 2019 | |
| #3495 | Type ChartsKTH Challenge 2019 | |
| #3496 | Damaged RoadsMoscow Pre-Finals Workshops 2022 Day 2 | |
| #3497 | Johnny's BirthdayMoscow Pre-Finals Workshops 2022 Day 2 | |
| #3498 | Modern ArtUSACO 2017 US Open Platinum | |
| #3499 | Switch GrassUSACO 2017 US Open Platinum | |
| #3500 | COWBASICUSACO 2017 US Open Platinum | |