【ProjectEuler】ProjectEuler_053(对于1≤n≤100,C(n,r)有多少超过100万?)
//Combinatoricselections//Problem53//Thereareexactlytenwaysofselectingthreefromfive,12345:////123,124,125,134,135,145,234,235,245,and345////Incombinatorics,weusethenotation,5C3=10.////Ingeneral,////nC