The second hint will be published on 9th January, 13:00 GMT.
By 2nd January 2022, 13:00 GMT, there are 1030 participants from 78 countries. 52 solutions to P1 were submitted, out of which 4 were correct.
Correct solutions by university students:
| First name | Surname | Country | School/University | P2 date time |
| Zhening Li | Eddie Chen | Canada/United States | Massachusetts Institute of Technology | 20/12/21 20:52 |
| Deng | Jinqiu | China | Beijing University of Aeronautics and Astronautics | 27/12/21 04:13 |
| Shofar | Sno | Suriname | Anton de Kom University of Suriname | 29/12/21 06:50 |
Correct solutions by pre-university students:
| Vlad-Ștefan | Oros | Romania | “Grigore Moisil” Theoretical High School | 21/12/21 06:22 |
The list of countries:
Algeria, Argentina, Australia, Azerbaijan, Bangladesh, Belarus, Belgique, Bosnia and Herzegovina, Brazil, Brunei Darussalam, Bulgaria, Canada, China, Costa Rica, Croatia, Czech Republic, Egypt, El Salvador, Estonia, Ethiopia, Finland, France, Georgia, Germany, Greece, Honduras, Hong Kong, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Kazakhstan, Korea, Kosovo, Kyrgyzstan, Latvia, Lebanon, Lithuania, Luxembourg, Macao, Malaysia, Mexico, Moldova, Mongolia, Nepal, Nigeria, North Macedonia, Pakistan, Peru, Philippines, Poland, Romania, Russia, Saudi Arabia, Serbia, Singapore, Slovakia, South Africa, Spain, Sri Lanka, Suriname, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United States, Uzbekistan, Vietnam