By the end of the fifth week, there are 598 registered participants from 67 countries (the list of countries is given below). For the Problem 3, during the first week, 42 solutions were submitted, out of which 18 were correct.
| First Name | Surname | School/University | Country | date | time |
| Dobrica | Jovanović | Mathematical Grammar School | Serbia | 19/01/20 | 14:14:00 |
| Yuechen | Zhu | Henan Experimental High School | China | 19/01/20 | 14:15:00 |
| Hanyi | Li | Chengdu Foreign Languages School | China | 19/01/20 | 14:49:00 |
| Ronald | Doboš | Gymnázium, Poštová 9, Košice | Slovakia | 19/01/20 | 15:16:00 |
| Tung | Linh | Currently in gap yer | Vietnam | 19/01/20 | 15:17:00 |
| Bayram Alp | Şahin | Ankara Sience HS | Turkey | 19/01/20 | 16:02:00 |
| Duc Huy | Tran | The Hong Kong University of Science and Technology | Viet Nam | 19/01/20 | 16:37:00 |
| Quan | Nguyen | Hanoi-Amsterdam High School for the Gifted | Vietnam | 19/01/20 | 17:16:00 |
| Oliwier | Urbański | VII LO im. Dąbrówki w Poznaniu | Poland | 19/01/20 | 22:39:00 |
| Pan | Feiyue | The High School of Anhui Normal University | China | 20/01/20 | 05:05:00 |
| Jaeyong | Lee | Seoul National University | Korea | 20/01/20 | 05:57:00 |
| Alessandro | Menegon | Colégio Objetivo Integrado | Brazil | 21/01/20 | 02:26:00 |
| Jerry | Han | Raffles Institution | Singapore | 21/01/20 | 15:43:00 |
| prakhar | singh | IIT Kanpur | india | 25/01/20 | 00:48:00 |
| Trang Đào | Công Minh | HUS High School for Gifted Student | Viet Nam | 25/01/20 | 18:13:00 |
| Batuhan | Keskin | BOGAZICI UNIVERSITY | Turkey | 26/01/20 | 00:19:00 |
| Antonia | Ghita | International Computer High School of Bucharest | Romania | 26/01/20 | 09:32:00 |
| Zhaoyan | Pang | Harbin No.3 Senior High | China | 26/01/20 | 11:00:00 |
Participating countries: Australia, Azerbaijan, Bahrain, Bangladesh, Belarus , Bosnia and Herzegovina, Brasil, Bulgaria, Cambodia, Canada, China, Costa Rica, Croatia, Ecuador, Egypt, El Salvador, Estonia, Finland, France, Georgia, Germany, Greece, Hong Kong, Hungary, India, Indonesia, Italy, Japan, Kazakhstan, Korea, Kosovo, Kyrgyzstan, Latvia, Lithuania, Luxembourg, Macedonia (North), Malaysia, Mexico, Moldova, Mongolia, Morocco, Nepal, Netherlands, Nigeria, Pakistan, Peru, Philippines , Poland, Portugal, Romania, Russia, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, Sweden, Switzerland, Syria, Tajikistan, Thailand, Turkey, Turkmenistan, United Kingdom, United States, Uzbekistan, Vietnam .