| CEOI23_gradingserver | | Bring Down the Grading Server Batch | 5 |
| CEOI23_incursion | | The Ties That Guide Us Interactive Two steps | 64 |
| CEOI23_light | | A Light Inconvenience Interactive | 46 |
| CEOI23_trade | | Tricks of the Trade Batch | 29 |
| CEOI24_battle | | Naval battle Batch | 59 |
| CEOI24_covid | | COVID tests Interactive | 37 |
| CEOI24_editor | | Text editor Batch | 56 |
| CEOI24_sprinklers | | Sprinklers Batch | 78 |
| CEOI24_stations | | Petrol stations Batch | 18 |
| CEOI24_toy | | Toy Batch | 122 |
| CEOI25_boardgames | | Boardgames Batch | 2 |
| CEOI25_equalmex | | Equalmex Batch | 9 |
| CEOI25_highest | | Highest Batch | 2 |
| CEOI25_lawnmower | | Lawn Mower Batch | 7 |
| CEOI25_splits | | Splits Batch | 2 |
| CEOI25_theseus | | Theseus Interactive Communication | 11 |
| CEOI26_birdwatchers | | Birdwatchers Batch | 3 |
| CEOI26_dfs | | DFS Batch | 28 |
| CEOI26_flowers | | Flower Cutting Batch | 23 |
| CEOI26_hunt | | Treasure Hunt Batch | 1 |
| CEOI26_towers | | Towers Batch | 18 |
| CEOI26_vim | | Vim Batch | 3 |
| CERC12_B | | Who wants to live forever? Batch | 2 |
| CERC12_D | | Non-boring sequences Batch | 7 |
| CERC12_F | | Farm and factory Batch | 5 |