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| Problem | Category | Types | Points | AC % | Users | |
|---|---|---|---|---|---|---|
| IOI '05 P2 - Mountain | IOI | Data Structures | 20p | 13.5% | 329 | |
| IOI '05 P3 - Mean Sequence | IOI | Intermediate Math | 12p | 20.5% | 292 | |
| IOI '05 P4 - Birthday | IOI | Implementation | 12p | 15.8% | 146 | |
| IOI '05 P6 - Rivers | IOI | Dynamic Programming | 20p | 30.9% | 312 | |
| IOI '05 Practice Task 3 - Polish Flag | IOI | Uncategorized | 20p | 8.2% | 5 | |
| IOI '06 P1 - Deciphering the Mayan Writing | IOI | String Algorithms | 7p | 38.9% | 447 | |
| IOI '06 P2 - Pyramid | IOI | Data Structures | 17p | 22.2% | 232 | |
| IOI '06 P4 - The Valley of Mexico | IOI | Dynamic Programming | 15p | 22.2% | 221 | |
| IOI '07 P1 - Aliens | IOI | Interactive | 12p | 14.7% | 27 | |
| IOI '07 P2 - Flood | IOI | Graph Theory | 25p | 43.9% | 137 | |
| IOI '07 P3 - Sails | IOI | Data Structures | 25p | 21.7% | 226 | |
| IOI '07 P4 - Miners | IOI | Dynamic Programming | 15p | 21.4% | 454 | |
| IOI '07 P5 - Pairs | IOI | Data Structures | 25p | 10.1% | 118 | |
| IOI '07 P6 - Training | IOI | Dynamic Programming, Graph Theory | 40p | 27.4% | 66 | |
| IOI '08 P1 - Type Printer | IOI | String Algorithms | 12p | 19.3% | 428 | |
| IOI '08 P2 - Islands | IOI | Dynamic Programming, Graph Theory | 25p | 11.0% | 116 | |
| IOI '08 P3 - Fish | IOI | Uncategorized | 35p | 9.8% | 64 | |
| IOI '08 P4 - Teleporters | IOI | Graph Theory, Greedy Algorithms | 25p | 35.6% | 16 | |
| IOI '08 P6 - Pyramid Base | IOI | Data Structures, Divide and Conquer | 40p | 11.9% | 10 | |
| IOI '09 P1 - Archery | IOI | Ad Hoc, Simulation | 45p | 13.4% | 41 | |
| IOI '09 P2 - Hiring | IOI | Uncategorized | 12p | 32.0% | 267 | |
| IOI '09 P3 - POI | IOI | Implementation | 7 | 29.1% | 542 | |
| IOI '09 P4 - Raisins | IOI | Dynamic Programming | 10p | 54.8% | 558 | |
| IOI '09 P5 - Garage | IOI | Implementation | 7 | 46.4% | 551 | |
| IOI '09 P6 - Mecho | IOI | Graph Theory | 15 | 14.7% | 331 | |
| IOI '09 P7 - Regions | IOI | Graph Theory, Interactive | 20p | 12.3% | 64 | |
| IOI '09 P8 - Salesman | IOI | Data Structures, Dynamic Programming | 25p | 16.8% | 137 | |
| IOI '09 Practice Task 3 - Museum | IOI | Uncategorized | 15p | 46.6% | 74 | |
| IOI '10 P1 - Cluedo | IOI | Implementation | 5p | 36.1% | 151 | |
| IOI '10 P2 - Hotter Colder | IOI | Interactive | 20 | 0.5% | 3 | |
| IOI '10 P3 - Quality of Living | IOI | Data Structures | 15p | 28.8% | 163 | |
| IOI '10 P3 - Quality of Living (Standard I/O) | IOI | Data Structures | 15p | 28.2% | 351 | |
| IOI '10 P5 - Memory | IOI | Implementation, Interactive | 5p | 22.5% | 145 | |
| IOI '10 P6 - Traffic Congestion | IOI | Graph Theory | 10p | 18.8% | 104 | |
| IOI '10 P6 - Traffic Congestion (Standard I/O) | IOI | Graph Theory | 10p | 33.1% | 420 | |
| IOI '10 P7 - Maze | IOI | Graph Theory | 25p | 0.0% | 0 | |
| IOI '11 P1 - Tropical Garden | IOI | Graph Theory | 25p | 15.7% | 44 | |
| IOI '11 P1 - Tropical Garden (Standard I/O) | IOI | Graph Theory | 25p | 11.6% | 169 | |
| IOI '11 P2 - Race | IOI | Graph Theory | 17p | 18.5% | 232 | |
| IOI '11 P2 - Race (Standard I/O) | IOI | Graph Theory | 17p | 15.2% | 550 | |
| IOI '11 P3 - Rice Hub | IOI | Greedy Algorithms, Simple Math | 15p | 18.6% | 139 | |
| IOI '11 P3 - Rice Hub (Standard I/O) | IOI | Greedy Algorithms, Simple Math | 15p | 19.4% | 508 | |
| IOI '11 P4 - Crocodile's Underground City | IOI | Graph Theory | 17p | 28.0% | 96 | |
| IOI '11 P4 - Crocodile's Underground City (Standard I/O) | IOI | Graph Theory | 17p | 19.2% | 380 | |
| IOI '11 P5 - Dancing Elephants | IOI | Data Structures | 40p | 10.1% | 44 | |
| IOI '11 P5 - Dancing Elephants (Standard I/O) | IOI | Data Structures | 20p | 10.6% | 97 | |
| IOI '11 P6 - Parrots | IOI | Ad Hoc, Interactive | 20p | 3.7% | 18 | |
| IOI '12 P1 - Pebbling Odometer | IOI | Ad Hoc, Implementation | 30p | 2.0% | 6 | |
| IOI '12 P2 - Parachute Rings | IOI | Graph Theory | 25p | 17.6% | 28 | |
| IOI '12 P2 - Parachute Rings (Standard I/O) | IOI | Graph Theory | 25p | 11.7% | 114 |