There will be no more hints for Problem 5 will be published on 6th May 2023, 13:00 GMT.There will be no more hints. The Problem 5 will remain open for submissions until t 23:59 GMT, 21st May 2023.
By 21th May 2023, 13:00 GMT, there are 1309 participants from 92 countries. 35 solutions to P5 were submitted, out of which 32 were correct. Next update: the best solutions and the final results, tentatively on the 31st May 2023.
Correct solutions by university students:
| First name | Surname | Country | School/University | P4 date time DD/MM/YY 00:00:00 |
| 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 |
| Alessio | Biccari | Italy | La Sapienza | 2/4/23 18:36 |
| Bowen | Tan | China | Jilin Normal University | 4/4/23 06:49 |
| Kerim | Cherkezov | Turkmenistan | Turkmen State University | 16/4/23 20:11 |
| Konstantin | Tripunovski | North Macedonia | University of Ljubljana – Medical Faculty | 24/4/23 13:45 |
| Soumyadeep | Sarma | India | Indian Institute of Science | 14/5/23 17:52 |
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 |
| Ching Yeung | Kwok | Hong Kong | Shing Kung Hui Tang Shiu Kin Secondary School | 3/4/23 13:40 |
| Dženan | Midžić | Bosnia and Herzegovina | JU Gimnazija “Bihać” | 3/4/23 16:48 |
| Yuchi | Zhang | China | United World College Changshu China | 6/4/23 12:55 |
| Alexandar | Roussev | Bulgaria | – | 12/4/23 16:58 |
| Guangyuan | Chen | Singapore | Raffles Institution | 17/4/23 16:10 |
| Zilang | Shu | China | Beijing National Day School | 23/4/23 13:15 |
| Michał | Kołodziejczyk | Poland | I High School in Zielona góra | 25/4/23 19:43 |
| Elias Koschier | Michail Ognyanov | Austria | ERG Donaustadt | 7/5/23 12:21 |
| Ruicheng | Ma | China | Harbin Normal University High School | 9/5/23 17:29 |
| Yu Cheng | Lim | Malaysia | Taylor’s College | 13/5/23 13:36 |
| Filip | Baciak | Poland | 1 LO w Chrzanowie | 14/5/23 08:06 |
| Mateusz | Kamiński | Poland | VI High School in Cracow | 19/5/23 07:48 |
| Harold Scott | Chua | Philippines | Philippine Science High School – Main Campus | 18/5/23 14:43 |
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, Tanzania, Thailand, Turkey, Turkmenistan, Ukraine, United Arab Emirates, United Kingdom, United States, Uzbekistan, Vietnam