Problem 2; intermediate results, weeks 5, 6

By the end of the eighth week, there are 598 registered participants from 67 countries (the list of countries is given below). For the Problem 2, during the first week, 19 solutions were submitted, out of which 5 were correct. During the second week, 11 more solutions were submitted, out of which 2 were correct. During the third week, 6 more solutions were submitted, but none of these were correct. During the fourth week, 16 more solutions were submitted, out of which 5 were correct. During the fifth week, 13 more solutions were submitted, out of which 6 were correct.

Week 1.

First NameSurnameSchool/UniversityCountrydatetime
TevžLotričGimnazija KranjSlovenia15/12/1915:03
OliwierUrbańskiVII LO im. Dąbrówki w PoznaniuPoland17/12/1915:23
Duc HuyTranThe Hong Kong University of Science and Technology Viet Nam18/12/1916:15
TungLinhCurrently in gap yerViet Nam19/12/1919:27
AntoniaGhitaInternational Computer High School of BucharestRomania20/12/1921:38

Week 2.

First NameSurnameSchool/UniversityCountrydatetime
RobertoMarín DelgadoUniversidad de Costa RicaCosta Rica22/12/1919:12:00
TanNguyenVietnam National University Vietnam25/12/1903:59:00

Week 4.

First NameSurnameSchool/UniversityCountrydatetime
JerryHanRaffles InstitutionSingapore06/01/2008:23:00
HanyiLiChengdu Foreign Languages SchoolChina06/01/2009:13:00
YuechenZhuHenan Experimental High SchoolChina06/01/2009:24:00
OliverLindströmKTHSweden07/01/2016:02:00
Trang ĐàoCông MinhHUS High School for Gifted StudentViet Nam09/01/2013:57:00

Week 5.

Bayram AlpŞahinAnkara Sience HSTurkey12/01/2015:49:00
HiểnNguyễnHUS High School for Gifted StudentsVietnam13/01/2004:36:00
RashedulIslamNotre Dame CollegeBangladesh18/01/2017:34:00
Absur KhanSiamNotre Dame CollegeBangladesh19/01/2011:05:00
DobricaJovanovićMathematical Grammar School Serbia19/01/2012:39:00
JohanesSuhardjoHKUSTIndonesia19/01/2012:57:00

Week 6.

Imtiaz TanweerRahimNotre Dame College25/01/2016:12:00
Zong YuLeeSMJK Chung Hwa Confucian26/01/2004:24:00

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 .