All medalists.
IMO & IOI, including honourable mentions.
RPRui PereiraPortugalIMO1992Competition recordBronze medalRRRui RaoChinaIMO2020Competition recordGold medalRLRuirong LiFranceIMO2025 · 2026Competition recordBronze medal · Silver medalRCRuitao ChenChinaIMO2021Competition recordGold medalRZRuixiang ZhangChinaIMO2008UC Berkeley ExtensionAssistant ProfessorIndexed profileRYRui YaoChinaIMO2018Competition recordSilver medalAutumn profileRWRuiying WuAustraliaIMO2021Competition recordHonourable mentionIndexed profile
Ruizhou YangCanadaIMO2016 · 2017Maven SecuritiesTraderAutumn profileRZRui Zhu WangPortugalIMO2019 · 2020SquarepointQuantitative DeveloperAutumn profileRHRumen HristovBulgariaIOI2008 · 2009 · 2010 · 2011 · 2012Competition recordSilver medal · Gold medalRMRumen MihovBulgariaIOI2021MNKnowledgeConsultantIndexed profileRZRumen ZarevBulgariaIMO2001 · 2002 · 2003Competition recordGold medal · Silver medalRVRune ValleNorwayIMO2002 · 2003CiscoSoftware EngineerIndexed profileRLRuochuan LiuChinaIMO1999Competition recordGold medalIndexed profileRTRuoxi TangChinaIMO1989Competition recordSilver medalRMRupert McCallumAustraliaIMO1992 · 1993University of TuebingenPostdoctoral ResearcherIndexed profileRNRupert NelsonNew ZealandIMO2006 · 2007Northland District Health BoardIndexed profile
Rushil MathurIndiaIMO2024Competition recordGold medalAutumn profileRJRusi JordanovBulgariaIMO1977 · 1978BulSQLSQL Database AdministratorIndexed profileRORuslanbek OzodboevUzbekistanIMO2015Competition recordHonourable mentionRIRuslan IsmailovRussian FederationIMO1992Competition recordSilver medalRMRuslan MaksimauBelarusIMO2005 · 2006CY Cergy Paris UniversitéMaître de conférencesIndexed profileRMRuslan MuslumovAzerbaijanIMO2007 · 2008Competition recordBronze medalRMRuslan MyratgeldiyevTurkmenistanIMO2016Competition recordHonourable mention
Ruslans AleksejevsLatviaIMO2017University of California, BerkeleyMathematics PhD studentAutumn profileRSRuslan SalimovRussian FederationIMO2015 · 2016Competition recordSilver medal · Gold medalRSRuslan SimonenkoUkraineIOI2007 · 2008FacebookSoftware DeveloperIndexed profileRSRusmin SoetjiptoIndonesiaIOI1998Competition recordSilver medalAutumn profileRCRussell CoxUnited States of AmericaIOI1995 · 1997Competition recordGold medal · Bronze medalRGRussell Geoffrey NeilsonNew ZealandIMO1995Competition recordHonourable mentionRLRussell LyonsUnited States of AmericaIMO1975Competition recordBronze medalRNRussell NeilsonNew ZealandIMO1996Competition recordBronze medalRBRustam BosimovUzbekistanIMO2007SberbankСтарший инженер по разработкеIndexed profileRDRustam DzhumaniiazovUkraineIOI2007Competition recordBronze medalIndexed profileRNRustam NovikovEstoniaIMO1997 · 1998 · 1999Coop Pank ASИнженер-программистIndexed profileRTRustam TimirbekovKazakhstanIMO1998 · 1999Competition recordHonourable mention · Bronze medalRGRustem GurbandurdyyevTurkmenistanIMO2017CrossBridge General Trading LLC.Regional ManagerIndexed profileRHRustem HaitovTurkmenistanIMO2016TurkcellInternIndexed profileRTRustem TakhanovKazakhstanIMO2000Nazarbayev UniversityAssistant ProfessorIndexed profileRCRutchathon Chairattana-apiromThailandIOI2017University of WashingtonGraduate Research AssistantIndexed profile
Ruvim KhvolesIsraelIMO1994Barak CapitalQuantitative AnalystAutumn profileRYRuwimal Yasantha PathirajaSri LankaIMO2013 · 2014 · 2015 · 2016Duke UniversityGraduate Teaching AssistantIndexed profileRARyan AlweissUnited States of AmericaIMO2015Competition recordGold medalRBRyan BaiCanadaIOI2022 · 2023 · 2024 · 2025Competition recordSilver medal · Gold medalIndexed profileRBRyan BaiCanadaIMO2024 · 2025Competition recordSilver medalIndexed profileRJRyan Jun Neng ChanSingaporeIMO2009ByteDanceGlobal Monetization ProductIndexed profileRLRyan LothianUnited KingdomIOI2006GoogleAI agentsIndexed profileRSRyan StaalNetherlandsIMO2024Competition recordSilver medalR(Ryan (Taehyeon) KoUnited States of AmericaIMO2006Wei Laboratories, Inc.Data Mining InternIndexed profileRWRyan WangAustraliaIOI2019Jane StreetSoftware EngineerAutumn profileRKRyhor KoshmanIOI2023Competition recordBronze medalIndexed profileRIRyo IshidaJapanIMO1997 · 1998Competition recordSilver medal · Bronze medalRHRyoji HiraguchiJapanIMO1995Competition recordSilver medalRSRyoma SatoJapanIOI2014Information-technology Promotion Agency, Japan (IPA)HPC & Optimization EngineerIndexed profileRSRyomei SugaiJapanIOI2021Competition recordGold medalRSRyong Sok ChangDemocratic People's Republic of KoreaIMO1992Competition recordBronze medalRORyoshun ObaJapanIMO2014The University of TokyoDoctoral StudentIndexed profileRHRyotaro HayashiJapanIOI2024Competition recordSilver medalRNRyszard NestPolandIMO1968Competition recordSilver medalRMRyu MinegishiJapanIMO2011株式会社データフォーシーズデータサイエンティストIndexed profile
Ruizhou YangCanadaIMO2016 · 2017Maven SecuritiesTraderAutumn profileRZRui Zhu WangPortugalIMO2019 · 2020SquarepointQuantitative DeveloperAutumn profileRHRumen HristovBulgariaIOI2008 · 2009 · 2010 · 2011 · 2012Competition recordSilver medal · Gold medalRMRumen MihovBulgariaIOI2021MNKnowledgeConsultantIndexed profileRZRumen ZarevBulgariaIMO2001 · 2002 · 2003Competition recordGold medal · Silver medalRVRune ValleNorwayIMO2002 · 2003CiscoSoftware EngineerIndexed profileRLRuochuan LiuChinaIMO1999Competition recordGold medalIndexed profileRTRuoxi TangChinaIMO1989Competition recordSilver medalRMRupert McCallumAustraliaIMO1992 · 1993University of TuebingenPostdoctoral ResearcherIndexed profileRNRupert NelsonNew ZealandIMO2006 · 2007Northland District Health BoardIndexed profileRushil MathurIndiaIMO2024Competition recordGold medalAutumn profileRJRusi JordanovBulgariaIMO1977 · 1978BulSQLSQL Database AdministratorIndexed profileRORuslanbek OzodboevUzbekistanIMO2015Competition recordHonourable mentionRIRuslan IsmailovRussian FederationIMO1992Competition recordSilver medalRMRuslan MaksimauBelarusIMO2005 · 2006CY Cergy Paris UniversitéMaître de conférencesIndexed profileRMRuslan MuslumovAzerbaijanIMO2007 · 2008Competition recordBronze medalRMRuslan MyratgeldiyevTurkmenistanIMO2016Competition recordHonourable mentionRuslans AleksejevsLatviaIMO2017University of California, BerkeleyMathematics PhD studentAutumn profileRSRuslan SalimovRussian FederationIMO2015 · 2016Competition recordSilver medal · Gold medalRSRuslan SimonenkoUkraineIOI2007 · 2008FacebookSoftware DeveloperIndexed profileRSRusmin SoetjiptoIndonesiaIOI1998Competition recordSilver medalAutumn profileRCRussell CoxUnited States of AmericaIOI1995 · 1997Competition recordGold medal · Bronze medalRGRussell Geoffrey NeilsonNew ZealandIMO1995Competition recordHonourable mentionRLRussell LyonsUnited States of AmericaIMO1975Competition recordBronze medalRNRussell NeilsonNew ZealandIMO1996Competition recordBronze medalRBRustam BosimovUzbekistanIMO2007SberbankСтарший инженер по разработкеIndexed profileRDRustam DzhumaniiazovUkraineIOI2007Competition recordBronze medalIndexed profileRNRustam NovikovEstoniaIMO1997 · 1998 · 1999Coop Pank ASИнженер-программистIndexed profileRTRustam TimirbekovKazakhstanIMO1998 · 1999Competition recordHonourable mention · Bronze medalRGRustem GurbandurdyyevTurkmenistanIMO2017CrossBridge General Trading LLC.Regional ManagerIndexed profileRHRustem HaitovTurkmenistanIMO2016TurkcellInternIndexed profileRTRustem TakhanovKazakhstanIMO2000Nazarbayev UniversityAssistant ProfessorIndexed profileRCRutchathon Chairattana-apiromThailandIOI2017University of WashingtonGraduate Research AssistantIndexed profileRuvim KhvolesIsraelIMO1994Barak CapitalQuantitative AnalystAutumn profileRYRuwimal Yasantha PathirajaSri LankaIMO2013 · 2014 · 2015 · 2016Duke UniversityGraduate Teaching AssistantIndexed profileRARyan AlweissUnited States of AmericaIMO2015Competition recordGold medalRBRyan BaiCanadaIOI2022 · 2023 · 2024 · 2025Competition recordSilver medal · Gold medalIndexed profileRBRyan BaiCanadaIMO2024 · 2025Competition recordSilver medalIndexed profileRJRyan Jun Neng ChanSingaporeIMO2009ByteDanceGlobal Monetization ProductIndexed profileRLRyan LothianUnited KingdomIOI2006GoogleAI agentsIndexed profileRSRyan StaalNetherlandsIMO2024Competition recordSilver medalR(Ryan (Taehyeon) KoUnited States of AmericaIMO2006Wei Laboratories, Inc.Data Mining InternIndexed profileRWRyan WangAustraliaIOI2019Jane StreetSoftware EngineerAutumn profileRKRyhor KoshmanIOI2023Competition recordBronze medalIndexed profileRIRyo IshidaJapanIMO1997 · 1998Competition recordSilver medal · Bronze medalRHRyoji HiraguchiJapanIMO1995Competition recordSilver medalRSRyoma SatoJapanIOI2014Information-technology Promotion Agency, Japan (IPA)HPC & Optimization EngineerIndexed profileRSRyomei SugaiJapanIOI2021Competition recordGold medalRSRyong Sok ChangDemocratic People's Republic of KoreaIMO1992Competition recordBronze medalRORyoshun ObaJapanIMO2014The University of TokyoDoctoral StudentIndexed profileRHRyotaro HayashiJapanIOI2024Competition recordSilver medalRNRyszard NestPolandIMO1968Competition recordSilver medalRMRyu MinegishiJapanIMO2011株式会社データフォーシーズデータサイエンティストIndexed profile