2021-P5 Best Solutions and Final Results

Problem 5 – Nonlinear circular resonator

Best solutions of Problem 5:
Nikita Semenin (1/3 of the full bonus) – a correct solution made at the first try and the only one submitted during the first week; a well written and solid solution which is somewhat different (mathematically) from the solution suggested by the hints, but is a good one nonetheless.
Zhening Li (1/3) – another well-written solution submitted during the second week when no hints have been provided.
Huiyuan Wang (1/3) – the last solution submitted during the period when no hints have been provided; perhaps less well documented than the two previous ones, but supplemented with a useful simulation.
Finally, two solutions which are not listed as the “best solutions” just because these were submitted at a later stage when substantial hints had been provided, but which are well written and can serve as a reference and learning material (earning both a bonus factor of 1.1), submitted by Oliwier Urbański and Vlad-Stefan Oros.

Final results for Problem 5

Pre-university students

First NameSurnameCountrySchoolscore
ZheningLiCanadaSir John A. Macdonald Secondary School3.26
OliwierUrbańskiPolandLiceum Ogólnokształcące nr 7 w Poznaniu1.78
Vlad-ȘtefanOrosRomania“Grigore Moisil” Informatics High School1.49
AntoniaGhitaRomaniaInternational Computer High School of Bucharest1.11
VukHipSerbiaMathematical grammar school1.01
Sebastián AndrésArévalo AguirreEl SalvadorInstituto Emiliani0.83
AlexandarRoussevBulgariaFirst Language School0.68

University students

First NameSurnameCountryUniversityscore
NikitaSemeninRussiaMoscow Insitute of Physics and Technology3.62
HuiyuanWangChinaUniversity of Cambridge3.13
KyleBomeislUnited StatesRutgers University1.43
PieterVan SteenweghenBelgiumImperial College London1.17
RicardsKnipsisLatviaUniversity of Manchester1.06
QianLinChinaUniversity of Oxford0.97

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.