| #13501 | Bits Are DangerousPetrozavodsk Summer 2013 Day 1 | |
| #13502 | Counting Amusing NumbersPetrozavodsk Summer 2013 Day 1 | |
| #13503 | Degree Of Number's EccentricityPetrozavodsk Summer 2013 Day 1 | |
| #13504 | Exact Number of DropsPetrozavodsk Summer 2013 Day 1 | |
| #13505 | Figure Of Simple SensePetrozavodsk Summer 2013 Day 1 | |
| #13506 | Gowk's Errand for MasterPetrozavodsk Summer 2013 Day 1 | |
| #13507 | Handicapped Onsite PredictionPetrozavodsk Summer 2013 Day 1 | |
| #13508 | Icy Roads Of NomelPetrozavodsk Summer 2013 Day 1 | |
| #13509 | Jelly-Oxygen BeansPetrozavodsk Summer 2013 Day 1 | |
| #13541 | A Plus BIOI 2023 Practice | |
| #13542 | ChoreographyIOI 2023 Practice | |
| #13543 | CoreputerIOI 2023 PracticeInteractive | |
| #13544 | Truck DriverIOI 2023 Practice | |
| #13545 | LockpickingIOI 2023 Practice | |
| #13546 | A + BIOI 2024 Practice | |
| #13547 | MachineIOI 2024 PracticeInteractive | |
| #13548 | PyramidsIOI 2024 Practice | |
| #13549 | TreasureIOI 2024 PracticeCommunication | |
| #13550 | 选数CQOI 2015CQTSC 2015 | |
| #13551 | 网络吞吐量CQOI 2015CQTSC 2015 | |
| #13552 | 任务查询系统CQOI 2015CQTSC 2015 | |
| #13553 | 多项式CQOI 2015CQTSC 2015 | |
| #13554 | 标识设计CQOI 2015CQTSC 2015 | |
| #13555 | IZLETCroatian OI 2019 | |
| #13556 | LJEPOTICACroatian OI 2019 | |
| #13557 | SEGWAYCroatian OI 2019 | |
| #13558 | TENISCroatian OI 2019 | |
| #13559 | PaintCroatian OI 2020 | |
| #13560 | PastiriCroatian OI 2020 | |
| #13561 | SemaforCroatian OI 2020 | |
| #13562 | ZagradeCroatian OI 2020Interactive | |
| #13563 | NadanCOCI 2018/2019 Contest #1 | |
| #13564 | ZamjenaCOCI 2018/2019 Contest #1 | |
| #13565 | CipeleCOCI 2018/2019 Contest #1 | |
| #13566 | StrahCOCI 2018/2019 Contest #1 | |
| #13567 | TeoretičarCOCI 2018/2019 Contest #1 | |
| #13568 | PreokretCOCI 2018/2019 Contest #2 | |
| #13569 | KockaCOCI 2018/2019 Contest #2 | |
| #13570 | DebloCOCI 2018/2019 Contest #2 | |
| #13571 | MajaCOCI 2018/2019 Contest #2 | |
| #13572 | SunčanjeCOCI 2018/2019 Contest #2 | |
| #13573 | MagnusCOCI 2018/2019 Contest #3 | |
| #13574 | PismoCOCI 2018/2019 Contest #3 | |
| #13575 | SajamCOCI 2018/2019 Contest #3 | |
| #13576 | NLOCOCI 2018/2019 Contest #3 | |
| #13577 | PraktičniCOCI 2018/2019 Contest #3 | |
| #13578 | ElderCOCI 2018/2019 Contest #4 | |
| #13579 | WandCOCI 2018/2019 Contest #4 | |
| #13580 | KisikCOCI 2018/2019 Contest #4 | |
| #13581 | SlagalicaCOCI 2018/2019 Contest #4 | |
| #13582 | AkviznaCOCI 2018/2019 Contest #4 | |
| #13583 | TitloviCOCI 2018/2019 Contest #5 | |
| #13584 | JarvisCOCI 2018/2019 Contest #5 | |
| #13585 | IspitCOCI 2018/2019 Contest #5 | |
| #13586 | ParametriziranCOCI 2018/2019 Contest #5 | |
| #13587 | TransportCOCI 2018/2019 Contest #5 | |
| #13588 | LunCOCI 2018/2019 Contest #6 | |
| #13589 | KonjCOCI 2018/2019 Contest #6 | |
| #13590 | SličiceCOCI 2018/2019 Contest #6 | |
| #13591 | SimfonijaCOCI 2018/2019 Contest #6 | |
| #13592 | MobitelCOCI 2018/2019 Contest #6 | |
| #13597 | BliskostCroatian OI 2023 | |
| #13598 | NestabilnostCroatian OI 2023 | |
| #13599 | NetrpeljivostCroatian OI 2023 | |
| #13600 | SličnostCroatian OI 2023 | |