combinatorics - Mathematics. the branch of discrete mathematics that deals with the study of arrangement of objects into sets, and in particular with two general types of problems: enumeration and existence;
дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://www.harcourt.com/dictionary/def/2/2/5/7/2257300.html;
