Oleg Semenov@oleg_s_aFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experienceoleg_s_a has not updated employment details yet.Educationoleg_s_a has not updated education details yet.Linksoleg_s_a has not updated links details yet. Skillsoleg_s_a has not updated skills details yet.