Hoàn Duy Nguyễn Trần@hoanduy27VietnamFollow BadgesProblem SolvingCPPDays of CodeSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencehoanduy27 has not updated employment details yet.Educationhoanduy27 has not updated education details yet.