| CCO21_day2problem3 | | Loop Town Batch | 4 |
| innopolis2021_final_A | | Parking Problem Batch | 4 |
| innopolis2021_final_E | | Rooted MST Batch | 4 |
| CPSPC17_posters | | Posters on the wall Batch | 4 |
| CEOI21_wells | | Wells Batch | 4 |
| JOI22_flights | | Flights Interactive Communication | 4 |
| CCO22_day1problem3 | | Double Attendance Batch | 4 |
| CCO22_day2problem1 | | Bi-ing Lottery Treekets Batch | 4 |
| CCO19_day1problem3 | | Winter Driving Batch | 4 |
| CEOI23_avoid | | How to Avoid Disqualification in 75 Easy Steps Interactive | 4 |
| JOI24_tricolor | | Tricolor Lights Two steps | 4 |
| CCO24_day2problem1 | | Infiltration Batch | 4 |
| CCO24_day2problem3 | | Telephone Plans Batch | 4 |
| JOI25_thief | | Space Thief Batch | 4 |
| COCI25_ravnalo | | Ravnalo Batch | 4 |
| CCO25_day1problem1 | | Asteroid Mining Batch | 4 |
| JOI26_joitour | | JOI Tour 2 Batch | 4 |
| KAISTRUN26SPRING_F | | Pragmatism Batch | 4 |
| APIO26_nightmarket | | Night Market Batch | 4 |
| APIO26_apio | | This is APIO, not APOI Interactive Communication | 4 |
| APIO26_game | | Communication Game Interactive Communication | 4 |
| APIO26_bike | | 자전거 Batch | 4 |
| APIO26_navigation | | 내비게이션 Interactive Communication | 4 |
| POSTECH26PPC_C | | Classical Interactive Problem Interactive | 4 |
| POSTECH26PPC_D | | 포닉스의 학점은? Batch | 4 |