| CEOI14_carnival | | Carnival Interactive | 609 |
| CEOI14_fangorn | | The Forest of Fangorn Batch | 49 |
| CEOI14_question_grader | | Question (Grader is different from the original contest) Two steps | 140 |
| CEOI14_wall | | Wall Batch | 22 |
| CEOI15_bobek | | Ice Hockey World Championship Batch | 339 |
| CEOI15_indcyc | | Potemkin cycle Batch | 91 |
| CEOI15_nuclearia | | Nuclearia Batch | 20 |
| CEOI15_pipes | | Pipes Batch | 206 |
| CEOI15_teams | | Calvinball championship Batch | 251 |
| CEOI16_icc | | ICC Batch | 218 |
| CEOI16_kangaroo | | Kangaroo Batch | 456 |
| CEOI16_match | | Match Batch | 166 |
| CEOI16_popeala | | Popeala Batch | 131 |
| CEOI16_router | | Router Output Only | 9 |
| CEOI17_building | | Building Bridges Batch | 436 |
| CEOI17_chase | | Chase Batch | 129 |
| CEOI17_mousetrap | | Mousetrap Batch | 97 |
| CEOI17_mul | | Multiply Batch | 15 |
| CEOI17_museum | | Museum Batch | 171 |
| CEOI17_oneway | | One-Way Streets Batch | 481 |
| CEOI17_palindromic | | Palindromic Partitions Batch | 468 |
| CEOI17_sure | | Sure Bet Batch | 515 |
| CEOI18_clo | | Cloud Computing Batch | 592 |
| CEOI18_fib | | Fibonacci representations Batch | 15 |
| CEOI18_glo | | Global Warming Batch | 823 |