Update solution for binomial-coefficients
Update solution for binomial-coefficients

LinsanityDu/hackerrank-1,jmpraveenraj/hackerrank,havelessbemore/hackerrank,hongyegong/hackerrank,havelessbemore/hackerrank,jmpraveenraj/hackerrank,havelessbemore/hackerrank,hongyegong/hackerrank,havelessbemore/hackerrank,hongyegong/hackerrank,LinsanityDu/hackerrank-1,havelessbemore/hackerrank,jmpraveenraj/hackerrank,jmpraveenraj/hackerrank,LinsanityDu/hackerrank-1,LinsanityDu/hackerrank-1,jmpraveenraj/hackerrank,hongyegong/hackerrank,LinsanityDu/hackerrank-1,hongyegong/hackerrank