All medalists.
IMO & IOI, including honourable mentions.
HSHaojia ShiChinaIMO2023 · 2024Competition recordGold medalIndexed profileHZHaolin ZhaoUnited KingdomIMO2024Competition recordSilver medalHFHaoqiang FanChinaIOI2011Competition recordGold medalHXHaoran XuChinaIOI2013MemSQLIndexed profileHWHaotian WangNew ZealandIMO2023 · 2024 · 2025Competition recordHonourable mention · Bronze medal · Silver medalHCHao-Wei ChuTaiwanIMO2002The Cincinnati Insurance CompaniesActuarial Analyst IIIIndexed profileHWHao WuChinaIMO2012Competition recordGold medalHXHao Xiang Gabriel GohSingaporeIMO2022 · 2023Competition recordSilver medal · Gold medalHYHaoxiang YuChinaIOI2021Competition recordGold medalIndexed profileHJHaoyang JinCanadaIOI2026Competition recordSilver medalHJHao-Yuan JiaoFranceIOI2026Competition recordHonourable mentionHWHaoyu WangChinaIMO2012Competition recordGold medalHZHao ZhangChinaIMO1986Competition recordGold medalHYHaozhe YangCanadaIMO2023Competition recordBronze medalIndexed profileHZHao ZuoChinaIMO2012Competition recordGold medalHMHaque Muhammad IshfaqBangladeshIMO2009 · 2010Competition recordHonourable mentionHTHaralambos TamvakisGreeceIMO1986 · 1987Competition recordBronze medalHEHarald EnglischGerman Democratic RepublicIMO1971 · 1972Staatliche Studienakademie LeipzigProfessorIndexed profileHFHarald FreijSwedenIMO2007ZenseactComputer Vision EngineerIndexed profileHHHarald HeidlerGerman Democratic RepublicIMO1986Competition recordBronze medalIndexed profileHSHarald SkarkeAustriaIMO1979 · 1981Competition recordBronze medal · Gold medalHNHariharan NarayananIndiaIMO1998Tata Institute of Fundamental ResearchFacultyIndexed profileHBHaris BrkićBosnia and HerzegovinaIMO2013Competition recordHonourable mentionHIHaris ImamovicBosnia and HerzegovinaIOI2020 · 2022SLAPStackIndexed profileHIHaris ImamovićBosnia and HerzegovinaIMO2021 · 2022SLAPStackIndexed profileHSHaris ShaqiriKosovoIMO2024 · 2025Competition recordHonourable mentionHCHarm CampmansNetherlandsIMO2009 · 2010Sioux TechnologiesMathware EngineerIndexed profileHDHarm DerksenNetherlandsIMO1988Northeastern UniversityDistinguished ProfessorIndexed profileHSHarold SteinackerAustriaIMO1985 · 1986Technische Universität WienSenior Research ScientistIndexed profileHMHaroon MoollaSouth AfricaIMO2008Competition recordHonourable mentionHSHarpreet SinghIndiaIOI2004 · 2005 · 2006Competition recordSilver medalHLHarri LappalainenFinlandIMO1991Competition recordBronze medalHLHarris LeungHong Kong, ChinaIOI2017 · 2018 · 2019 · 2020 · 2021Spark4KidsIndexed profileHLHarris LeungHong KongIMO2019 · 2020 · 2021Spark4KidsIndexed profileHRHarry ReimannGerman Democratic RepublicIMO1975Competition recordSilver medalAutumn profileHSHarry SlatyerAustraliaIOI2008GoogleStaff Software EngineerIndexed profileHWHarry WigginsSouth AfricaIMO2001 · 2002Competition recordBronze medalHDHarshana DantanarayanaSri LankaIOI2001 · 2004Amazon Web Services (AWS)Senior Software Development EngineerIndexed profile
Harshin PosinaIndiaIOI2022Jane StreetQuantitative Trading InternAutumn profile
Hartmut MaennelGermanyIMO1979 · 1981Google DeepMindStaff Research ScientistAutumn profileHSHartmut SchwetlickGerman Democratic RepublicIOI1989Competition recordSilver medalHAHarun AlibegovićBosnia and HerzegovinaIMO2023 · 2024Competition recordHonourable mention · Silver medalHHHarun HindijaBosnia and HerzegovinaIMO2010 · 2011 · 2012ZimperiumResearcherIndexed profileHMHarun MemićBosnia and HerzegovinaIMO2025 · 2026Competition recordBronze medalIndexed profileHŠHarun ŠiljakBosnia and HerzegovinaIMO2006 · 2007Trinity College DublinAssistant ProfessorIndexed profileHYHarvey YauUnited KingdomIMO2014 · 2015 · 2016 · 2017 · 2018Competition recordSilver medal · Gold medalHYHarvey YauUnited KingdomIOI2018Competition recordBronze medalHFHasan Fehmi AteşTürkiyeIMO1993 · 1994Competition recordBronze medalHHHasan HasanzadeAzerbaijanIMO2012 · 2013lightfulweb OÜSenior Full Stack EngineerIndexed profileHHHasan Hüseyin ErusluTürkiyeIMO2005 · 2006GoogleSoftware EngineerIndexed profileHIHasan InciSwitzerlandIMO2000 · 2001University of ZurichIndexed profileHJHasan JaddouhSyriaIOI2014noonSoftware EngineerIndexed profileHFHasanli FaridAzerbaijanIMO2014 · 2015Competition recordHonourable mention · Bronze medalIndexed profileHVHasan ValiyevAzerbaijanIOI2025 · 2026Competition recordBronze medalHAHassan AhmedPakistanIMO2017Competition recordHonourable mentionHHHassane Hindi El IdrissiMoroccoIMO1987Competition recordBronze medalHMHatem Muqdad Mawlood Al-AniIraqIMO2024Competition recordBronze medalHMHatim MarouaneMoroccoIMO1993 · 1994Competition recordBronze medalHDHau Dang HuyVietnamIOI2025 · 2026Competition recordSilver medalHCHau-Wei ChuTaiwanIMO2001The Cincinnati Insurance CompaniesActuarial Analyst IIIIndexed profile
Harshin PosinaIndiaIOI2022Jane StreetQuantitative Trading InternAutumn profileHartmut MaennelGermanyIMO1979 · 1981Google DeepMindStaff Research ScientistAutumn profileHSHartmut SchwetlickGerman Democratic RepublicIOI1989Competition recordSilver medalHAHarun AlibegovićBosnia and HerzegovinaIMO2023 · 2024Competition recordHonourable mention · Silver medalHHHarun HindijaBosnia and HerzegovinaIMO2010 · 2011 · 2012ZimperiumResearcherIndexed profileHMHarun MemićBosnia and HerzegovinaIMO2025 · 2026Competition recordBronze medalIndexed profileHŠHarun ŠiljakBosnia and HerzegovinaIMO2006 · 2007Trinity College DublinAssistant ProfessorIndexed profileHYHarvey YauUnited KingdomIMO2014 · 2015 · 2016 · 2017 · 2018Competition recordSilver medal · Gold medalHYHarvey YauUnited KingdomIOI2018Competition recordBronze medalHFHasan Fehmi AteşTürkiyeIMO1993 · 1994Competition recordBronze medalHHHasan HasanzadeAzerbaijanIMO2012 · 2013lightfulweb OÜSenior Full Stack EngineerIndexed profileHHHasan Hüseyin ErusluTürkiyeIMO2005 · 2006GoogleSoftware EngineerIndexed profileHIHasan InciSwitzerlandIMO2000 · 2001University of ZurichIndexed profileHJHasan JaddouhSyriaIOI2014noonSoftware EngineerIndexed profileHFHasanli FaridAzerbaijanIMO2014 · 2015Competition recordHonourable mention · Bronze medalIndexed profileHVHasan ValiyevAzerbaijanIOI2025 · 2026Competition recordBronze medalHAHassan AhmedPakistanIMO2017Competition recordHonourable mentionHHHassane Hindi El IdrissiMoroccoIMO1987Competition recordBronze medalHMHatem Muqdad Mawlood Al-AniIraqIMO2024Competition recordBronze medalHMHatim MarouaneMoroccoIMO1993 · 1994Competition recordBronze medalHDHau Dang HuyVietnamIOI2025 · 2026Competition recordSilver medalHCHau-Wei ChuTaiwanIMO2001The Cincinnati Insurance CompaniesActuarial Analyst IIIIndexed profile