xuefeng han@davidxfhanUnited StatesFollow BadgesProblem SolvingCPPPythonC language CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Python (Basic)VerifiedskillCertificate: C (Basic)VerifiedskillCertificate: C (Intermediate)VerifiedskillWork Experiencedavidxfhan has not updated employment details yet.Educationdavidxfhan has not updated education details yet.