Problem sources
| Waterloo Programming Contest 2015-07-18 | 1 | 4.8Medium |
| Waterloo Programming Contest 2015-09-27 | 5 | 4.9Medium |
| Waterloo Programming Contest 2016-10-01 | 5 | 4.2Medium |
| Waterloo/Alberta Programming Contest 2004-06-12 | 5 | 4.7Medium |
| Waterloo/Alberta Programming Contest 2005-06-11 | 5 | 5.5Hard |
| Will Code for Drinks 2019/2 | 6 | 5.1Medium |
| Will Code for Drinks 2021 | 8 | 4Medium |
| Will Code for Drinks 2022 | 9 | 4.3Medium |
| Will Code for Drinks 2023 | 10 | 4.6Medium |
| Will Code for Drinks 2024 | 10 | 6Hard |