Hyun-Sik Lee@dlgustlr45Republic of KoreaFollow BadgesProblem SolvingCPPJava CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencedlgustlr45 has not updated employment details yet.Educationdlgustlr45 has not updated education details yet.