Sergey Tikhonov@sergey_tFollow BadgesProblem SolvingPythonSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experiencesergey_t has not updated employment details yet.EducationLomonosov Moscow State UniversityLinkssergey_t has not updated links details yet. Skillssergey_t has not updated skills details yet.