Jing Du@john999Follow BadgesProblem SolvingCPP CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Java (Basic)VerifiedskillCertificate: Java (Intermediate)VerifiedskillCertificate: C++ (Basic)VerifiedskillWork Experiencejohn999 has not updated employment details yet.Educationjohn999 has not updated education details yet.Linksjohn999 has not updated links details yet. Skillsjohn999 has not updated skills details yet.