Haohua Wan@hwan3Follow BadgesProblem SolvingCPPDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experiencehwan3 has not updated employment details yet.Educationhwan3 has not updated education details yet.Linkshwan3 has not updated links details yet. Skillshwan3 has not updated skills details yet.