PC2021: Intermediate results, Problem 5, week 3

By 16th May 2021, there are 1050 registered participants from 71 countries (the list of countries is given below). During the first two weeks, 13 solutions were submitted, out of which three were correct

Correct solutions were submitted by:

First NameSurnameCountrySchool/Universitydatetime
NikitaSemeninRussiaMoscow Institute of Physics and Technology26/04/202120:39
ZheningLiCanadaSir John A. Macdonald Secondary School02/05/202114:07
HuiyuanWangChinaUniversity of Cambridge02/05/202117:07

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.