Codeforces Beta Round #95 (Div. 2) C. The World is a Theatre 组合数学
C.TheWorldisaTheatreTherearenboysandmgirlsattendingatheatreclub.Tosetaplay"TheBigBangTheory",theyneedtochooseagroupcontainingexactlytactorscontainingnolessthan4boysandnolessthanonegirl.Howmanywaysaret