easy la 7 o6 w- i( ~% qthe last with has the number in form of 2^n and has the biggest n among all % j/ N. h4 ^; v: ptvb now,tvbnow,bttvbi.e 65536 = 2^16
easy latvb now,tvbnow,bttvb; L. x% y8 ^, ?
the last person must has the number in form of 2^n and has the biggest n among all * X. @6 \5 K5 m: j( Vi.e 65536 = 2^16