Dariusz Bil@oyama_sanGermanyFollow BadgesProblem SolvingCPPDays of CodeDays of JSDays ofStatisticsSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experienceoyama_san has not updated employment details yet.Educationoyama_san has not updated education details yet.