The first hint for Problem 5 will be published on 3rd April 2022, 13:00 GMT .
By 27th March 2022, 13:00 GMT, there are 1124 participants from 80 countries. 19 solutions to P4 were submitted, out of which 13 were correct.
Correct solutions by university students:
| First name | Surname | Country | School/University | P5 date time DD/MM/YY 00:00:00 |
| Zhening Li | Eddie Chen | Canada/United States | Massachusetts Institute of Technology | 20/3/22 15:58 |
| Bayram Alp | Sahin | Turkey | Bogazici University | 20/3/22 16:51 |
| Marinus | Lehmann | Germany | University of Potsdam | 21/3/22 13:36 |
| Shofar | Sno | Suriname | Anton de Kom University of Suriname | 22/3/22 19:56 |
| Ricardo | Ochel | Germany | Heidelberg University | 23/3/22 12:10 |
| Ziyue | Wang | China | Hebei University of Technology | 25/3/22 06:24 |
| Alessandro | Rezzi | Italy | University of Padova | 27/3/22 19:49 |
| Isaac | Wu | Australia | University of Melbourne | 30/3/22 15:53 |
| Jaroslav | Herman | Czech Republic | Charles University | 1/4/22 23:24 |
Correct solutions by pre-university students:
| Vlad-Ștefan | Oros | Romania | “Grigore Moisil” Theoretical High School | 20/3/22 14:07 |
| Dženan | Midžić | Bosnia and Herzegovina | JU Gimnazija “Bihać” | 20/3/22 17:55 |
| Emerson Franzua | Aldana Gavarrete | Honduras | School | 21/3/22 00:10 |
| Luca | Milanese | Italy | Liceo “Leonardo da Vinci”, Terracina | 27/3/22 18:22 |
| Sebastián | Arévalo | El Salvador | Instituto Emiliani | 3/4/22 05:07 |
The list of countries:
Algeria, Argentina, Australia, Azerbaijan, Bahrain, Bangladesh, Belarus, Belgique, Bosnia and Herzegovina, Brazil, Brunei Darussalam, Bulgaria, Canada, China, Costa Rica, Croatia, Czech Republic, Cuba, 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