| CEOI22_homework | | Homework Batch | 232 |
| CEOI22_measures | | Measures Batch | 101 |
| CEOI22_parking | | Parking Batch | 30 |
| CEOI22_prize | | Prize Interactive | 52 |
| CEOI23_avoid | | How to Avoid Disqualification in 75 Easy Steps Interactive | 4 |
| CEOI23_balance | | Brought Down the Grading Server? Batch | 10 |
| CEOI23_gradingserver | | Bring Down the Grading Server Batch | 4 |
| CEOI23_incursion | | The Ties That Guide Us Interactive Two steps | 44 |
| CEOI23_light | | A Light Inconvenience Interactive | 33 |
| CEOI23_trade | | Tricks of the Trade Batch | 19 |
| CEOI24_battle | | Naval battle Batch | 52 |
| CEOI24_covid | | COVID tests Interactive | 26 |
| CEOI24_editor | | Text editor Batch | 44 |
| CEOI24_sprinklers | | Sprinklers Batch | 69 |
| CEOI24_stations | | Petrol stations Batch | 14 |
| CEOI24_toy | | Toy Batch | 82 |
| CEOI25_boardgames | | Boardgames Batch | 0 |
| CEOI25_equalmex | | Equalmex Batch | 0 |
| CEOI25_highest | | Highest Batch | 0 |
| CEOI25_lawnmower | | Lawn Mower Batch | 1 |
| CEOI25_splits | | Splits Batch | 0 |
| CEOI25_theseus | | Theseus Interactive Communication | 1 |
| CERC12_B | | Who wants to live forever? Batch | 2 |
| CERC12_D | | Non-boring sequences Batch | 5 |
| CERC12_F | | Farm and factory Batch | 5 |