Problem 1: results

By 28th December 2019, there were 577 registered participants from 67 countries (the list of countries is given at the bottom of the page). In total, 209 solutions have been submitted, out of which 64 were correct.

Pre-university students.

First NameSurnameSchoolCountryPr 1 score
DobricaJovanovićMathematical Grammar School Serbia3.33
ViniciusDe Alcantara NevoaColegio ArenaBrazil2.24
GuilhermoCostaColégio Objetivo IntegradoBrazil2.122
HiểnNguyễnHUS High School for Gifted StudentsVietnam1.929
Zhu Youheng Shenzhen Middle School China1.949
Bayram AlpŞahinAnkara Sience HSTurkey1.435
OliwierUrbańskiVII LO im. Dąbrówki w PoznaniuPoland1.305
YuechenZhuHenan Experimental High SchoolChina1.305
PanFeiyue The High School of Anhui Normal UniversityChina1.078
ZhaoyanPangHarbin No.3 MiddleschoolChina1.089
AlexandreBastosObjetivo IntegradoBrazil0.891
Trang ĐàoCông MinhHUS High School for Gifted StudentVietnam0.81
QuanNguyenHanoi-Amsterdam High School for the GiftedVietnam0.81
TejasBansodResonance KotaIndia0.9
HanyiLiChengdu Foreign Languages SchoolChina0.81
MaYizhouHangzhou No.2 High School of Zhejiang ProvinceChina0.9
AntoniaGhitaInternational Computer High School of BucharestRomania0.81
JerryHanRaffles InstitutionSingapore0.9
GuanyuZhuShenzhen Middle SchoolChina0.9
AlessandroMenegonColégio Objetivo IntegradoBrazil0.9
MertUnsalBahcesehir High School for Science and TechnologyTurkey0.72
RonaldDobošGymnázium, Poštová 9, KošiceSlovakia0.72
AlperTezcan Bahcesehir High School for Science and Technology (BHSSciTech)Turkey0.8
TevžLotričGimnazija KranjSlovenia0.648
AlexandreFouquetEuropean School Luxembourg ILuxembourg0.76
GourishGargSri Chaitanya ChandigarhIndia0.8
ArinKediaBhagat Public Sr Sec SchoolIndia0.8
JiakaiChenHwa Chong Institution Singapore 0.713
Absur KhanSiamNotre Dame CollegeBangladesh0.7
Nithesh Sanjeevi SaravananSaravananNUS High SchoolSingapore0.56
JakubLewandowskiLiceum Politechniki ŁódzkiejPoland0.63
RashedulIslamNotre Dame CollegeBangladesh0.7
IvanKharichkinSchool No 239, Saint PetersburgRussia0.7
EndreBokorBudapesti Fazekas Mihály Gyakorló Általános Iskola és GimnáziumHungary0.665
HoangLe MinhHUS High School for Gifted StudentsVietnam0.7
HishamAlmalkiManarat Al-Riyadh SchoolSaudi Arabia0.56
Xuanyu LinShenzhen Foreign Languages School China0.7
AnastasiaStovbchatayaLyceum BSUBelarus0.504
AnttiAsikainenMikkelin lukioFinland0.54
XilaiDaiChangzhou Senior High School Of Jiangsu ProvinceChina0.54
Zhengliang Zhang
China0.54
GabrielPatiñoPreparatory faculty in Russia(ИАТЭ)Perú0.486
Alexandru Mihai IulianBuzeaNational Highschool “Ion Maiorescu” GiurgiuRomania0.54
Imtiaz TanweerRahimNotre Dame CollegeBangladesh0.48
Timothy HoNUS High School of Mathematics and ScienceSingapore 0.432
DalerPirovTRLBS “Hotam & P.V.”Tajikistan0.54
M. SaminSalekNotre Dame College Bangladesh 0.368

University students.

First NameSurnameUniversityCountryPr 1 score
Duc HuyTranThe Hong Kong University of Science and Technology (HKUST)Viet Nam3.33
OliverLindströmKTHSweden2.615
TungLinhCurrently in gap yerVietnam2.594
HaykSoghomonyanETH ZurichSwitzerland1.949
JohanesSuhardjoHKUSTIndonesia1.607
TanNguyenVietnam National University Vietnam1.449
RobertoMarín DelgadoUniversidad de Costa RicaCosta Rica1.435
Prakhar SinghIIT Kanpurindia1.035
ErikSünderhaufTechnical University of MunichGermany0.958
BatuhanKeskin Boğaziçi University Turkey0.891
JonathanGräfeTechnische Universität DresdenGermany0.72
IstvánCsépányiBudapest University Of Technology And EconomicsHungary0.7
PéterElekBudapest University Of Technology And EconomicsHungary0.665
Niko Nanda Putra NilaLay Technical University of Munich Germany0.64
DamianoTiettoUniversità degli Studi di PadovaItaly0.63
GabrielCapeloUniversidade de São PauloBrazil0.63
NikitaPoljakovUniversity of BristolUnited Kingdom0.368

Date and time when correct solutions were submitted.

First NameSurnamedatetime
DobricaJovanović17/11/1918:05
Duc HuyTran18/11/1905:43
TungLinh18/11/1906:55
OliverLindström18/11/1916:05
ViniciusDe Alcantara Nevoa18/11/1917:38
GuilhermoCosta18/11/1918:14
HiểnNguyễn21/11/1906:56
Zhu Youheng 23/11/1914:38
HaykSoghomonyan24/11/1903:40
RobertoMarín Delgado24/11/1914:51
Bayram AlpŞahin24/11/1916:47
OliwierUrbański24/11/1918:35
YuechenZhu25/11/1907:13
PanFeiyue 25/11/1911:15
ZhaoyanPang25/11/1915:37
AlexandreBastos25/11/1919:51
Trang ĐàoCông Minh26/11/1912:11
QuanNguyen26/11/1915:53
TanNguyen27/11/1914:27
TejasBansod28/11/1914:53
JohanesSuhardjo29/11/1907:40
HanyiLi29/11/1911:55
MaYizhou29/11/1913:53
AntoniaGhita29/11/1916:56
JerryHan30/11/1904:32
GuanyuZhu30/11/1910:43
ErikSünderhauf30/11/1910:50
Prakhar Singh30/11/1914:39
BatuhanKeskin30/11/1918:04
AlessandroMenegon30/11/1923:55
MertUnsal01/12/1914:50
RonaldDoboš01/12/1915:28
JonathanGräfe01/12/1917:21
AlperTezcan 02/12/1913:37
Niko Nanda Putra NilaLay02/12/1920:21
TevžLotrič03/12/1921:41
AlexandreFouquet04/12/1918:47
GourishGarg05/12/1908:35
ArinKedia07/12/1915:00
JiakaiChen08/12/1903:19
Absur KhanSiam08/12/1908:25
DamianoTietto08/12/1917:10
Nithesh Sanjeevi SaravananSaravanan08/12/1917:12
JakubLewandowski08/12/1921:26
RashedulIslam09/12/1916:18
IstvánCsépányi09/12/1918:27
IvanKharichkin09/12/1920:45
PéterElek09/12/1922:47
EndreBokor11/12/1921:34
HoangLe Minh12/12/1910:30
HishamAlmalki14/12/1915:50
GabrielCapelo15/12/1901:14
Xuanyu Lin15/12/1906:49
AnastasiaStovbchataya15/12/1912:55
AnttiAsikainen16/12/1918:19
XilaiDai18/12/1906:13
Zhengliang Zhang19/12/1902:01
GabrielPatiño19/12/1916:29
Alexandru Mihai IulianBuzea21/12/1913:25
Imtiaz TanweerRahim22/12/1908:47
Timothy Ho22/12/1909:09
DalerPirov22/12/1912:11
M. SaminSalek23/12/1921:35
NikitaPoljakov24/12/1921:34

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 .