The first hint for Problem 4 will be published on 9th April 2023, 13:00 GMT.
By 2nd April 2023, 13:00 GMT, there are 1264 participants from 91 countries. 17 solutions to P5 were submitted, out of which 14 were correct. Next update of the intermediate results: 9th April 2023, 13:00 GMT.
Correct solutions by university students:
| Ziyue | Wang | China | Hebei University of Technology | 26/3/23 13:55 |
| Marinus | Lehmann | Germany | University of Potsdam | 26/3/23 16:11 |
| Anindya | Guria | India | Indian Institute of Science | 26/3/23 17:04 |
| Lukas | Schicht | Germany | University of Rostock | 26/3/23 18:24 |
| Luka | Passek-Kumerički | Croatia | University of Zagreb | 27/3/23 16:27 |
| Gil | Ronen | Israel | Hebrew University of Jerusalem | 28/3/23 14:40 |
| Bayram Alp | Şahin | Turkey | Bogazici University | 29/3/23 11:10 |
Correct solutions by pre-university students:
| Guotao | He | China | Nanning No.3 High School | 26/3/23 14:01 |
| Tomas | Babelis | Lithuania | Vilniaus jėzuitų gimnazija | 26/3/23 15:09 |
| Lincoln | Liu | Hong Kong | Sha Tin College | 26/3/23 15:14 |
| Rhythm | Kedia | India | MB International | 26/3/23 17:38 |
| Ilan, Ivan (Team) | Mihelja, Hegedić | Croatia | XV. gymnasium Zagreb, V. gymnasium Zagreb | 27/3/23 00:09 |
| Chung Wang | Lam | Hong Kong | St. Paul’s Co-educational College | 27/3/23 14:27 |
| Eppu | Leinonen | Finland | Munkkiniemen yhteiskoulu | 27/3/23 15:15 |
The list of countries:
Algeria, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahrain, Bangladesh, Belarus, Belgium, Bosnia and Herzegovina, Brazil, Bulgaria, Cambodia, Cameroon, Canada, China, Croatia, Cuba, Czech Republic, Ecuador, Egypt, El Salvador, Estonia, Finland, France, Georgia, Germany, Greece, Guatemala, Honduras, Hong Kong, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Kazakhstan, Kenya, Kosovo, Kyrgyzstan, Latvia, Lithuania, Macau, Malaysia, Mexico, Moldova, Montenegro, Nepal, Netherlands, Nigeria, North Macedonia, Pakistan, Peru, Philippines, Poland, Romania, Russia, Rwanda, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Arab Emirates, United Kingdom, United States, Uzbekistan, Vietnam