easy la% s4 c$ ~2 F. G/ C
the last with has the number in form of 2^n and has the biggest n among alltvb now,tvbnow,bttvb- y" a- e3 U$ b- m( U
i.e 65536 = 2^16
easy latvb now,tvbnow,bttvb; r, {' A3 C& s' u6 D
the last person must has the number in form of 2^n and has the biggest n among all8 U5 L$ ]6 W# H* e/ S; n
i.e 65536 = 2^16