O.V. Druzhinina - Dr.Sc. (Phys.-Math.), Professor, Chief Researcher, Federal Research Center «Informatics and Management» of the Russian Academy of Sciences. E-mail: ovdruzh@mail.ru O.N. Masina - Dr.Sc. (Phys.-Math.), Professor, Department of Mathematical Modeling and Computer Technologies, Yelets State University named after I.A. Bunin. E-mail: olga121@inbox.ru E.V. Igonina - Assistant, Department of Applied Mathematics and Informatics, Yelets State University named after I.A. Bunin. E-mail: elenaigonina7@mail.ru