| #8505 | Almost Aligned | |
| #8506 | Beating the Record | |
| #8507 | Clever Cell Choices | |
| #8508 | DiviDuelo | |
| #8509 | Expanding STACKS! | |
| #8510 | Fair Distribution | |
| #8511 | Greek Casino | |
| #8512 | Harmonic Operations | |
| #8513 | Insects, Mathematics, Accuracy, and Efficiency | |
| #8514 | Joys of Trading | |
| #8515 | KMOP | |
| #8516 | LED Matrix | |
| #8517 | Interesting Paths | |
| #8518 | Roars III | |
| #8519 | Radars | |
| #8520 | Xor Partitions | |
| #8521 | Pattern Search II | |
| #8522 | Waterfall Matrix | |
| #8523 | Puzzle II | |
| #8524 | Weather Forecast | |
| #8525 | Mercenaries | |
| #8526 | Polygon II | |
| #8527 | Power Divisions | |
| #8528 | Chords | |
| #8529 | Balance of Permutation | |
| #8530 | Cowntact TracingUSACO 2023 December Platinum | |
| #8531 | A Graph ProblemUSACO 2023 December Platinum | |
| #8532 | Train SchedulingUSACO 2023 December Platinum | |
| #8533 | Island VacationUSACO 2024 January Platinum | |
| #8534 | Merging CellsUSACO 2024 January Platinum | |
| #8535 | Mooball Teams IIIUSACO 2024 January Platinum | |
| #8536 | Lazy CowUSACO 2024 February Platinum | |
| #8537 | Minimum Sum of MaximumsUSACO 2024 February Platinum | |
| #8538 | Infinite AdventureUSACO 2024 February Platinum | |
| #8539 | Identity TheftUSACO 2024 US Open Platinum | |
| #8540 | Splitting HaybalesUSACO 2024 US Open Platinum | |
| #8541 | Activating RobotsUSACO 2024 US Open Platinum | |
| #8542 | Add One 2CCPC Final 2023 | |
| #8543 | Periodic SequenceCCPC Final 2023 | |
| #8544 | Colorful Graph 2CCPC Final 2023 | |
| #8545 | Min or MaxCCPC Final 2023 | |
| #8546 | Min or Max 2CCPC Final 2023 | |
| #8547 | Whose Land?CCPC Final 2023 | |
| #8548 | China Convex Polygon ContestCCPC Final 2023 | |
| #8549 | The GameCCPC Final 2023 | |
| #8550 | All the Way LeftCCPC Final 2023 | |
| #8551 | DFS Order 5CCPC Final 2023 | |
| #8552 | SticksCCPC Final 2023 | |
| #8553 | Exchanging KubicCCPC Final 2023Interactive | |
| #8554 | Bot FriendsCCPC Final 2023 | |
| #8555 | Dress to ImpressPetrozavodsk Summer 2019 Day 6 | |
| #8556 | Somewhere Over the RainbowPetrozavodsk Summer 2019 Day 6 | |
| #8557 | Goldberg MachinePetrozavodsk Summer 2019 Day 6 | |
| #8558 | Grid GamePetrozavodsk Summer 2019 Day 6 | |
| #8559 | $k$-coloringPetrozavodsk Summer 2019 Day 6 | |
| #8560 | Just Shuffle the InputPetrozavodsk Summer 2019 Day 6 | |
| #8561 | Restoring a PermutationPetrozavodsk Summer 2019 Day 6 | |
| #8562 | Shadow CompanionPetrozavodsk Summer 2019 Day 6 | |
| #8563 | The Older We Are, The Worse It HurtsPetrozavodsk Summer 2019 Day 6 | |
| #8564 | Three VectorsPetrozavodsk Summer 2019 Day 6 | |
| #8565 | Basic Blooms | |
| #8566 | Can We Still Qualify For Semifinals? | |
| #8567 | Cheap Construction | |
| #8568 | Expected Diameter | |
| #8569 | Generalized Collatz Conjecture | |
| #8570 | Idola-Tree | |
| #8571 | Palworld | |
| #8572 | Passing Game | |
| #8573 | Slothful Secretary | |
| #8574 | Swirly Sort | |
| #8575 | Three Person Tree Game | |
| #8576 | Symphony in c++ major | |
| #8577 | 평균 최대화KOI TST 2024 Day 1 | |
| #8578 | 과일 게임KOI TST 2024 Day 1 | |
| #8579 | 경찰과 도둑KOI TST 2024 Day 1 | |
| #8580 | 철도 2KOI TST 2024 Day 1 | |
| #8581 | 섬KOI TST 2024 Day 2 | |
| #8582 | 점프 게임KOI TST 2024 Day 2 | |
| #8583 | 팰린드롬 판별하기KOI TST 2024 Day 2 | |
| #8584 | 바이러스KOI TST 2024 Day 2 | |
| #8585 | TouristNOI 2024 Qualification | |
| #8586 | PartyNOI 2024 Qualification | |
| #8587 | PhotoNOI 2024 Qualification | |
| #8588 | Amusement ParkNOI 2024 Qualification | |
| #8589 | ExplosivesNOI 2024 Qualification | |
| #8590 | Problem SetterNOI 2024 Final | |
| #8591 | ShopsNOI 2024 Final | |
| #8592 | Toxic Gene 2NOI 2024 FinalInteractive | |
| #8593 | CoinNOI 2024 Final | |
| #8594 | FieldNOI 2024 Final | |
| #8595 | Точки на прямiйUOI 2024 Stage IV Day 1Interactive | |
| #8596 | Подарунок ЛедiUOI 2024 Stage IV Day 1 | |
| #8597 | Запити красот пiдмасивiвUOI 2024 Stage IV Day 1 | |
| #8598 | AND МасивUOI 2024 Stage IV Day 1 | |
| #8599 | Кольорова таблицяUOI 2024 Stage IV Day 2 | |
| #8600 | ФутболUOI 2024 Stage IV Day 2 | |