By 23rd February 2020, there are 640 registered participants from 68 countries (the list of countries is given below). For the Problem 4, during the first week, 33 solutions were submitted, out of which 10 were correct. During the second week, 12 solutions were submitted, out of which 2 were correct and the status of one is unknown (only answer submitted).
Second week:
| First Name | Surname | School/University | Country | Date | Time |
| Yuechen | Zhu | Henan Experimental High School | Henan Experimental High School | 24/02/20 | 02:28:00 |
| Antonia | Ghita | International Computer High School of Bucharest | International Computer High School of Bucharest | 29/02/20 | 20:43:00 |
| Duc Huy | Tran | The Hong Kong University of Science and Technology (HKUST) | The Hong Kong University of Science and Technology | 01/03/20 | 12:39:00 |
First week:
| Name | Surname | School/University | Country | Date | time |
| Zhaoyan | Pang | Harbin No.3 Senior High | China | 16/02/20 | 14:58:00 |
| Dobrica | Jovanović | Mathematical Grammar School | Serbia | 16/02/20 | 15:34:00 |
| Tung | Linh | Currently in gap yer | Vietnam | 16/02/20 | 19:42:00 |
| Tevž | Lotrič | Gimnazija Kranj | Slovenia | 16/02/20 | 21:34:00 |
| Quan | Nguyen | Hanoi-Amsterdam High School for the Gifted | Vietnam | 17/02/20 | 14:18:00 |
| Johanes | Suhardjo | HKUST | Indonesia | 18/02/20 | 08:54:00 |
| Oliwier | Urbański | VII LO im. Dąbrówki w Poznaniu | Poland | 18/02/20 | 22:26:00 |
| Hanyi | Li | Chengdu Foreign Languages School | China | 19/02/20 | 07:32:00 |
| Endre | Bokor | Budapesti Fazekas Mihály Gyakorló Általános Iskola és Gimnázium | Hungary | 22/02/20 | 21:37:00 |
| Fang Tzu | Hsu | National Taiwan University | Taiwan | 23/02/20 | 11:32:00 |
Participating countries: Australia, Azerbaijan, Bahrain, Bangladesh, Belarus , Bosnia and Herzegovina, Brasil, Bulgaria, Cambodia, Canada, China, Chinese Taipei, 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 .