| #1401 | Making Friends is FunJOISC 2014 Day 2 | |
| #1402 | Collecting StampsJOISC 2014 Day 2 | |
| #1403 | JOIOJIJOISC 2014 Day 3 | |
| #1404 | ScarecrowsJOISC 2014 Day 3 | |
| #1405 | VoltageJOISC 2014 Day 3 | |
| #1406 | Constellation 2JOISC 2014 Day 4 | |
| #1407 | Kanji ShiritoriJOISC 2014 Day 4Communication | |
| #1408 | StrapsJOISC 2014 Day 4 | |
| #1409 | Bus TourJOISC 2013 Day 1 | |
| #1410 | Collecting Images is FunJOISC 2013 Day 1 | |
| #1411 | Communication JammingJOISC 2013 Day 1 | |
| #1412 | JOI PosterJOISC 2013 Day 1 | |
| #1413 | Construction ProjectJOISC 2013 Day 2 | |
| #1414 | MascotsJOISC 2013 Day 2 | |
| #1415 | SpyJOISC 2013 Day 2 | |
| #1416 | CakeJOISC 2013 Day 3 | |
| #1417 | KoalaJOISC 2013 Day 3 | |
| #1418 | Mountain Rescue TeamJOISC 2013 Day 3Interactive | |
| #1420 | PresentsJOISC 2013 Day 4 | |
| #1421 | SpaceshipsJOISC 2013 Day 4 | |
| #1422 | AvgPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1423 | BinPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1424 | CatPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1425 | DivPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1426 | ExpPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1427 | FlipPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1428 | GrpPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1429 | HitPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1430 | IneqPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1431 | JoyPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1432 | KilkPetrozavodsk Winter 2020 Day 7Gennady Korotkevich Contest | |
| #1433 | OutlierPetrozavodsk Winter 2020 Day 6 | |
| #1434 | A Math ProblemPetrozavodsk Winter 2020 Day 6 | |
| #1435 | A Permutation ProblemPetrozavodsk Winter 2020 Day 6 | |
| #1436 | Split in SetsPetrozavodsk Winter 2020 Day 6 | |
| #1437 | The Destruction of the CrystalsPetrozavodsk Winter 2020 Day 6 | |
| #1438 | BallsPetrozavodsk Winter 2020 Day 6 | |
| #1439 | Football MatchPetrozavodsk Winter 2020 Day 6 | |
| #1440 | HillPetrozavodsk Winter 2020 Day 6 | |
| #1441 | Special GamePetrozavodsk Winter 2020 Day 6 | |
| #1442 | Even More Exciting GamePetrozavodsk Winter 2020 Day 6 | |
| #1443 | Potato ShufflePetrozavodsk Winter 2020 Day 6 | |
| #1444 | PalindromePetrozavodsk Winter 2020 Day 6 | |
| #1449 | Mountain SkylineWaterloo Fall 2021 Local | |
| #1450 | NoiseWaterloo Fall 2021 Local | |
| #1451 | Bus ConnectionsWaterloo Fall 2021 Local | |
| #1452 | Not Long EnoughWaterloo Fall 2021 Local | |
| #1453 | FroggerWaterloo Fall 2021 Local | |
| #1454 | Um nik's AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1455 | String AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1456 | StalinSort AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1457 | FFT AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1458 | Binary Search AlgorithmPetrozavodsk Winter 2020 Day 8Interactive | |
| #1459 | Face Recognition AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1460 | Petr's AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1461 | Greedy AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1462 | Euclid's AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1463 | Closest Pair AlgorithmPetrozavodsk Winter 2020 Day 8 | |
| #1464 | Interactive AlgorithmPetrozavodsk Winter 2020 Day 8Interactive | |
| #1465 | Not Our ProblemPetrozavodsk Winter 2020 Day 8 | |
| #1466 | Quick ChangeGreater New York Regional 2006 | |
| #1467 | Triangular SumsGreater New York Regional 2006 | |
| #1468 | Shuffle'm UpGreater New York Regional 2006 | |
| #1469 | Push Button LockGreater New York Regional 2006 | |
| #1470 | Sign Message FormattingGreater New York Regional 2006 | |
| #1471 | Visible Lattice PointsGreater New York Regional 2006 | |
| #1472 | Triangular N-Queens ProblemGreater New York Regional 2006 | |
| #1473 | Non-divisible 2-3 Power SumsGreater New York Regional 2006 | |
| #1474 | Margaritas on the River WalkGreater New York Regional 2006 | |
| #1479 | Islands in the Data StreamGreater New York Regional 2013 | |
| #1480 | Von Neumann's FlyGreater New York Regional 2013 | |
| #1481 | Strahler OrderGreater New York Regional 2013 | |
| #1482 | Pisano PeriodsGreater New York Regional 2013 | |
| #1483 | Deranged ExamsGreater New York Regional 2013 | |
| #1484 | ChompGreater New York Regional 2013Unavailable | |
| #1485 | Triangle Count Sequences of Polygon TriangulationsGreater New York Regional 2013 | |
| #1486 | Powers of PascalGreater New York Regional 2013 | |
| #1487 | ContrabandGreater New York Regional 2013 | |
| #1488 | Hexagonal TerritoryAPIO 2021 | |
| #1489 | Rainforest JumpsAPIO 2021 | |
| #1490 | Road ClosuresAPIO 2021 | |
| #1492 | Standing Out from the HerdUSACO 2017 December Platinum | |
| #1493 | Push a BoxUSACO 2017 December Platinum | |
| #1494 | Greedy Gift TakersUSACO 2017 December Platinum | |
| #1495 | LifeguardsUSACO 2018 January Platinum | |
| #1496 | Cow at LargeUSACO 2018 January Platinum | |
| #1497 | SprinklersUSACO 2018 January Platinum | |
| #1498 | SlingshotUSACO 2018 February Platinum | |
| #1499 | New BarnsUSACO 2018 February Platinum | |
| #1500 | Cow GymnastsUSACO 2018 February Platinum | |