Xin L@xinliu0015United StatesFollow BadgesProblem SolvingCPPDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillCertificate: C++ (Basic)VerifiedskillWork Experiencexinliu0015 has not updated employment details yet.Educationxinliu0015 has not updated education details yet.