Problems
| Problem Name | Code | Points | Users | AC Rate | Date Added |
|---|---|---|---|---|---|
| IOI '11 - Dancing Elephants | ioi1122 | 30p | 98 | 9.93% | 2013-08-26 |
| IOI '12 - Jousting Tournament | ioi1223 | 30p | 156 | 15.49% | 2013-08-12 |
| IOI '13 - Dreaming | ioi1311 | 20p | 394 | 17.05% | 2013-07-15 |
| IOI '13 - Game | ioi1323 | 30p | 167 | 8.83% | 2013-07-28 |
| IOI '14 Practice Task - Square | ioi1401 | 12p | 150 | 46.10% | 2014-06-25 |
| IOI '13 - Robots | ioi1322 | 20p | 241 | 13.73% | 2013-07-28 |
| IOI '13 - Wombats | ioi1313 | 40p | 72 | 9.72% | 2013-07-18 |
| IOI '13 - Art Class | ioi1312 | 30p | 75 | 2.61% | 2013-07-15 |
| IOI '05 - Garden | ioi0511 | 30p | 191 | 21.71% | 2010-07-23 |
| IOI '05 Practice Task - Polish Flag | ioi0503 | 20p | 4 | 10.61% | 2010-07-27 |
| IOI '97 - The Toxic iShongololo | ioi9713 | 20p | 1 | 1.80% | 2013-12-26 |
| IOI '97 - Map Labelling | ioi9721 | 20p | 1 | 4.88% | 2013-12-26 |
| IOI '96 - Magic Squares | ioi9623 | 15p | 70 | 29.61% | 2013-12-22 |
| IOI '96 - Longest Prefix | ioi9622 | 12 | 90 | 16.35% | 2013-12-22 |
| IOI '96 - Network of Schools | ioi9613 | 20p | 64 | 23.18% | 2013-12-22 |
| IOI '96 - Sorting a Three-Valued Sequence | ioi9621 | 10 | 110 | 31.91% | 2013-12-22 |
| IOI '97 - Character Recognition | ioi9722 | 30p | 5 | 2.33% | 2013-12-27 |
| IOI '98 - Contact | ioi9811 | 15p | 36 | 10.75% | 2013-12-21 |
| IOI '98 - Camelot | ioi9822 | 15p | 41 | 41.30% | 2013-12-21 |
| IOI '98 - Polygon | ioi9823 | 15 | 48 | 28.35% | 2009-08-20 |
| IOI '98 - Picture | ioi9821 | 20 | 67 | 27.16% | 2013-12-21 |
| IOI '98 - Party Lamps | ioi9813 | 15p | 101 | 31.02% | 2013-12-21 |
| IOI '98 - Starry Night | ioi9812 | 15 | 22 | 36.51% | 2013-12-21 |
| IOI '96 - Job Processing | ioi9612 | 20p | 42 | 36.91% | 2013-12-22 |
| IOI '96 - A Game | ioi9611 | 10 | 188 | 48.40% | 2013-12-22 |
| IOI '94 - The Buses | ioi9422 | 20p | 17 | 5.42% | 2009-08-20 |
| IOI '94 - The Circle | ioi9423 | 17p | 11 | 34.38% | 2009-08-20 |
| IOI '94 - The Clocks | ioi9421 | 10 | 106 | 26.79% | 2013-12-26 |
| IOI '94 - The Primes | ioi9413 | 25p | 24 | 7.02% | 2013-12-26 |
| IOI '94 - The Triangle | ioi9411 | 7 | 632 | 60.19% | 2013-12-25 |
| IOI '94 - The Castle | ioi9412 | 10 | 143 | 24.63% | 2013-12-25 |
| IOI '95 Practice Task - Fence Factory | ioi9501 | 15p | 7 | 17.50% | 2014-04-11 |
| IOI '95 Practice Task - Word Chains | ioi9502 | 12 | 40 | 32.60% | 2014-04-13 |
| IOI '95 - Letter Game | ioi9521 | 15p | 25 | 21.28% | 2013-12-25 |
| IOI '95 - Street Race | ioi9522 | 15p | 33 | 25.19% | 2013-12-25 |
| IOI '95 - Shopping Offers | ioi9512 | 15p | 34 | 28.77% | 2013-12-25 |
| IOI '95 - Packing Rectangles | ioi9511 | 15p | 20 | 47.92% | 2013-12-24 |
| IOI '95 Practice Task - Bar Codes | ioi9503 | 20p | 17 | 37.74% | 2014-04-13 |
| IOI '99 - Hidden Codes | ioi9912 | 20p | 8 | 16.46% | 2009-08-20 |
| IOI '99 - Traffic Lights | ioi9921 | 15 | 19 | 26.37% | 2009-08-21 |
| IOI '03 - Amazing Robots | ioi0322 | 20 | 36 | 9.47% | 2009-12-15 |
| IOI '04 - Hermes | ioi0411 | 15p | 162 | 23.75% | 2010-06-22 |
| IOI '03 Practice Task - Balancing Act | ioi0301 | 15 | 96 | 47.15% | 2014-04-13 |
| IOI '03 - Seeing the Boundary | ioi0323 | 20p | 30 | 10.64% | 2010-03-05 |
| IOI '02 - Bus Terminals | ioi0222 | 30p | 50 | 14.22% | 2010-06-19 |
| IOI '03 - Comparing Code | ioi0312 | 25p | 27 | 14.84% | 2010-06-22 |
| IOI '04 - Artemis | ioi0412 | 15p | 76 | 10.03% | 2010-07-26 |
| IOI '04 - Farmer | ioi0422 | 15p | 179 | 15.74% | 2010-02-27 |
| IOI '05 - Birthday | ioi0521 | 20p | 96 | 13.43% | 2010-06-25 |
| IOI '05 - Rivers | ioi0523 | 30p | 156 | 29.70% | 2010-08-01 |
