数学专业经典读物Thisisatextbookforanintroductorycombinatoricscourselastingoneortwosemesters.Anextensivelistofproblems,rangingfromroutineexercisestoresearchquestions,isincluded.Ineachsection,therearealsoexercisesthatcontainmaterialnotexplicitlydiscussedintheprecedingtext,soastoprovideinstructo