Problems
| Problem Name | Code | Points | Users | AC Rate | Date Added |
|---|---|---|---|---|---|
| IOI '96 - Longest Prefix | ioi9622 | 12 | 90 | 16.35% | 2013-12-22 |
| IOI '96 - Magic Squares | ioi9623 | 15p | 70 | 29.61% | 2013-12-22 |
| 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 '97 - Character Recognition | ioi9722 | 30p | 5 | 2.33% | 2013-12-27 |
| IOI '98 - Contact | ioi9811 | 15p | 36 | 10.75% | 2013-12-21 |
| IOI '98 - Starry Night | ioi9812 | 15 | 22 | 36.51% | 2013-12-21 |
| IOI '98 - Party Lamps | ioi9813 | 15p | 101 | 31.02% | 2013-12-21 |
| IOI '98 - Picture | ioi9821 | 20 | 67 | 27.16% | 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 '99 - Hidden Codes | ioi9912 | 20p | 8 | 16.46% | 2009-08-20 |
| IOI '99 - Traffic Lights | ioi9921 | 15 | 19 | 26.37% | 2009-08-21 |
| IOI '99 - Flatten | ioi9922 | 30p | 14 | 19.47% | 2009-08-22 |
| IOI '99 - Little Shop of Flowers | ioi9911 | 10 | 123 | 29.18% | 2009-08-20 |
| IOI '99 - A Strip of Land | ioi9923 | 25p | 28 | 9.50% | 2009-08-22 |
| IOI '00 - Car Parking | ioi0012 | 15p | 37 | 15.27% | 2009-08-22 |
| IOI '00 - Walls | ioi0021 | 10 | 86 | 30.62% | 2009-08-22 |
| IOI '00 - Building with Blocks | ioi0023 | 20p | 5 | 23.33% | 2009-08-23 |
| IOI '00 - Palindrome | ioi0011 | 10 | 364 | 20.98% | 2009-08-22 |
| IOI '00 - Post Office | ioi0022 | 15p | 149 | 39.50% | 2009-08-22 |
| IOI '01 - Depot | ioi0123 | 30p | 36 | 11.58% | 2010-03-07 |
| IOI '01 - Mobile Phones | ioi0111 | 15p | 238 | 18.83% | 2014-06-24 |
| IOI '01 - Twofive | ioi0113 | 25p | 20 | 6.38% | 2013-12-21 |
| IOI '02 - Utopia Divided | ioi0212 | 20p | 77 | 22.22% | 2010-07-25 |
| IOI '02 - The Troublesome Frog | ioi0211 | 15p | 67 | 17.31% | 2010-06-18 |
| IOI '02 - Batch Scheduling | ioi0221 | 17p | 139 | 20.88% | 2010-06-02 |
| 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 '03 - Seeing the Boundary | ioi0323 | 20p | 30 | 10.64% | 2010-03-05 |
| IOI '03 Practice Task - Balancing Act | ioi0301 | 15 | 96 | 47.15% | 2014-04-13 |
| IOI '03 - Amazing Robots | ioi0322 | 20 | 36 | 9.47% | 2009-12-15 |
| IOI '04 - Hermes | ioi0411 | 15p | 162 | 23.75% | 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 '04 - Phidias | ioi0421 | 10p | 216 | 57.96% | 2009-12-19 |
| IOI '04 - Empodia | ioi0423 | 30p | 92 | 17.96% | 2010-06-23 |
| IOI '05 - Mountains | ioi0513 | 20p | 142 | 13.19% | 2010-06-24 |
| IOI '05 - Birthday | ioi0521 | 20p | 96 | 13.43% | 2010-06-25 |
| IOI '05 - Rivers | ioi0523 | 30p | 156 | 29.70% | 2010-08-01 |
| IOI '05 Practice Task - Polish Flag | ioi0503 | 20p | 4 | 10.61% | 2010-07-27 |
| IOI '05 - Garden | ioi0511 | 30p | 191 | 21.71% | 2010-07-23 |
| IOI '05 - Mean Sequence | ioi0512 | 12p | 225 | 22.46% | 2009-08-27 |
| IOI '06 - Deciphering the Mayan Writing | ioi0611 | 15p | 302 | 38.08% | 2009-09-01 |
| IOI '06 - Pyramid | ioi0612 | 25p | 165 | 17.44% | 2010-08-01 |
| IOI '06 - The Valley of Mexico | ioi0621 | 15p | 173 | 21.91% | 2013-11-14 |
| IOI '07 - Flood | ioi0712 | 30p | 97 | 23.71% | 2009-09-08 |
| IOI '07 - Sails | ioi0713 | 30p | 161 | 20.14% | 2009-09-09 |
| IOI '07 - Pairs | ioi0722 | 30p | 98 | 10.73% | 2009-09-10 |
| IOI '07 - Miners | ioi0721 | 20p | 305 | 25.38% | 2009-09-10 |
