Problems
| Problem | Category | Types | Points | AC % | Users | |
|---|---|---|---|---|---|---|
| IOI '00 P1 - Palindrome | IOI | Dynamic Programming | 10p | 18.6% | 832 | |
| IOI '00 P2 - Car Parking | IOI | Uncategorized | 15p | 17.7% | 53 | |
| IOI '00 P4 - Walls | IOI | Graph Theory | 12 | 36.1% | 231 | |
| IOI '00 P5 - Post Office | IOI | Dynamic Programming | 15p | 40.6% | 183 | |
| IOI '00 P6 - Building with Blocks | IOI | Uncategorized | 20p | 6.6% | 7 | |
| IOI '01 P1 - Mobile Phones | IOI | Data Structures | 15p | 27.5% | 707 | |
| IOI '01 P2 - Ioiwari Game | IOI | Game Theory | 12p | 34.5% | 7 | |
| IOI '01 P3 - Twofive | IOI | Ad Hoc | 25p | 16.8% | 65 | |
| IOI '01 P6 - Depot | IOI | Uncategorized | 30p | 12.1% | 39 | |
| IOI '02 P1 - The Troublesome Frog | IOI | Uncategorized | 15p | 16.5% | 78 | |
| IOI '02 P2 - Utopia Divided | IOI | Uncategorized | 20p | 24.5% | 91 | |
| IOI '02 P4 - Batch Scheduling | IOI | Dynamic Programming | 20p | 37.5% | 323 | |
| IOI '02 P5 - Bus Terminals | IOI | Ad Hoc | 30p | 14.8% | 53 | |
| IOI '03 P2 - Comparing Code | IOI | Uncategorized | 25p | 17.6% | 32 | |
| IOI '03 P5 - Amazing Robots | IOI | Uncategorized | 20 | 11.4% | 38 | |
| IOI '03 P6 - Seeing the Boundary | IOI | Geometry | 20p | 16.6% | 66 | |
| IOI '03 Practice Task 1 - Balancing Act | IOI | Uncategorized | 15 | 46.4% | 125 | |
| IOI '04 P1 - Artemis | IOI | Uncategorized | 15p | 6.9% | 69 | |
| IOI '04 P2 - Hermes | IOI | Uncategorized | 15p | 23.5% | 188 | |
| IOI '04 P2 - Hermes (Hard) | IOI | Data Structures | 20p | 8.1% | 9 | |
| IOI '04 P3 - Polygon | IOI | Geometry | 20p | 3.1% | 1 | |
| IOI '04 P4 - Phidias | IOI | Dynamic Programming | 10p | 53.6% | 900 | |
| IOI '04 P5 - Farmer | IOI | Uncategorized | 15p | 13.3% | 211 | |
| IOI '04 P6 - Empodia | IOI | Uncategorized | 30p | 16.9% | 141 | |
| IOI '05 P1 - Garden | IOI | Dynamic Programming | 20p | 21.4% | 253 | |
| IOI '05 P2 - Mean Sequence | IOI | Intermediate Math | 12p | 21.0% | 275 | |
| IOI '05 P3 - Mountain | IOI | Data Structures | 20p | 13.3% | 300 | |
| IOI '05 P4 - Birthday | IOI | Implementation | 12p | 15.7% | 141 | |
| IOI '05 P6 - Rivers | IOI | Dynamic Programming | 20p | 30.2% | 290 | |
| IOI '05 Practice Task 3 - Polish Flag | IOI | Uncategorized | 20p | 10.6% | 4 | |
| IOI '06 P1 - Deciphering the Mayan Writing | IOI | String Algorithms | 7p | 39.5% | 433 | |
| IOI '06 P2 - Pyramid | IOI | Data Structures | 17p | 22.5% | 220 | |
| IOI '06 P4 - The Valley of Mexico | IOI | Dynamic Programming | 15p | 22.1% | 216 | |
| IOI '07 P1 - Aliens | IOI | Interactive | 12p | 15.8% | 24 | |
| IOI '07 P2 - Flood | IOI | Graph Theory | 25p | 44.9% | 136 | |
| IOI '07 P3 - Sails | IOI | Data Structures | 25p | 21.5% | 213 | |
| IOI '07 P4 - Miners | IOI | Dynamic Programming | 15p | 21.3% | 445 | |
| IOI '07 P5 - Pairs | IOI | Data Structures | 25p | 10.1% | 117 | |
| IOI '07 P6 - Training | IOI | Dynamic Programming, Graph Theory | 40p | 27.9% | 67 | |
| IOI '08 P1 - Type Printer | IOI | String Algorithms | 12p | 20.1% | 411 | |
| IOI '08 P2 - Islands | IOI | Dynamic Programming, Graph Theory | 25p | 10.7% | 112 | |
| IOI '08 P3 - Fish | IOI | Uncategorized | 35p | 9.9% | 64 | |
| IOI '08 P4 - Teleporters | IOI | Graph Theory, Greedy Algorithms | 25p | 30.2% | 13 | |
| IOI '08 P6 - Pyramid Base | IOI | Data Structures, Divide and Conquer | 40p | 13.8% | 8 | |
| IOI '09 P1 - Archery | IOI | Ad Hoc, Simulation | 45p | 13.4% | 37 | |
| IOI '09 P2 - Hiring | IOI | Uncategorized | 12p | 32.3% | 253 | |
| IOI '09 P3 - POI | IOI | Implementation | 7 | 28.8% | 530 | |
| IOI '09 P4 - Raisins | IOI | Dynamic Programming | 10p | 54.7% | 546 | |
| IOI '09 P5 - Garage | IOI | Implementation | 7 | 46.5% | 537 | |
| IOI '09 P6 - Mecho | IOI | Graph Theory | 15 | 14.8% | 326 |