PC2021: Intermediate results, Problem 3, week 1

By 7th February 2021, there are 992 registered participants from 71 countries (the list of countries is given below). During the first week, 27 solutions were submitted, out of which 7 were correct.

Correct solutions were submitted by:

First NameSurnameCountrySchool/Universitydatetime
ZheningLiCanadaSir John A. Macdonald Secondary School28/02/2120:37
HuiyuanWangChinaUniversity of Cambridge01/03/2108:56
YuechenZhuChinaPeking University01/03/2115:22
LotusChenChinaNo.2 High School Shijiazhuang01/03/2115:39
NikitaSemeninRussiaMoscow Institute of Physics and Technology01/03/2117:56
OliwierUrbańskiPolandLiceum Ogólnokształcące nr 7 w Poznaniu02/03/2114:11
EddieChenUnited StatesWest-Windsor Plainsboro High School North06/03/2102:05

Participating countries: Algeria, Azerbaijan, Australia, Bangladesh, Belarus, Belgium, Bosnia and Herzegovina, Bolivia, Brazil, Bulgaria, Cambodia, Canada, China, Croatia, Czechia, Egypt, El Salvador, Estonia, Finland, Georgia, Germany, Greece, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Kazakhstan, Kenya, Korea, Kyrgyzstan, Latvia, Lebanon, Lithuania, Macedonia, Malaysia, Mexico, Moldova, Mongolia, Nepal, Nigeria, North Macedonia, Pakistan, Peru, Philippines, Poland, Romania, Russia, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Syria, Taiwan, Thailand, Turkey, Turkmenistan, United Arab Emirates, United Kingdom, United States, Uzbekistan, Vietnam.