Sergey Kovalev@Good4elFollow BadgesProblem SolvingCPPPython CertificationsCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Basic)VerifiedskillWork ExperienceGood4el has not updated employment details yet.EducationGood4el has not updated education details yet.LinksGood4el has not updated links details yet. SkillsGood4el has not updated skills details yet.