| CEOI21_ltriominoes | | L-triominoes Batch | 21 |
| CEOI21_newspapers | | Newspapers Batch | 77 |
| CEOI21_tortoise | | Tortoise Batch | 16 |
| CEOI21_wells | | Wells Batch | 4 |
| CEOI22_abracadabra | | Abracadabra Batch | 136 |
| CEOI22_drawing | | Drawing Batch | 41 |
| CEOI22_homework | | Homework Batch | 240 |
| CEOI22_measures | | Measures Batch | 103 |
| CEOI22_parking | | Parking Batch | 30 |
| CEOI22_prize | | Prize Interactive | 53 |
| CEOI23_avoid | | How to Avoid Disqualification in 75 Easy Steps Interactive | 4 |
| CEOI23_balance | | Brought Down the Grading Server? Batch | 11 |
| CEOI23_gradingserver | | Bring Down the Grading Server Batch | 4 |
| CEOI23_incursion | | The Ties That Guide Us Interactive Two steps | 47 |
| CEOI23_light | | A Light Inconvenience Interactive | 34 |
| CEOI23_trade | | Tricks of the Trade Batch | 22 |
| CEOI24_battle | | Naval battle Batch | 54 |
| CEOI24_covid | | COVID tests Interactive | 27 |
| CEOI24_editor | | Text editor Batch | 48 |
| CEOI24_sprinklers | | Sprinklers Batch | 71 |
| CEOI24_stations | | Petrol stations Batch | 14 |
| CEOI24_toy | | Toy Batch | 98 |
| CEOI25_boardgames | | Boardgames Batch | 0 |
| CEOI25_equalmex | | Equalmex Batch | 3 |
| CEOI25_highest | | Highest Batch | 1 |