1,3,7,15,31,(),127,255括号里填多少

问题描述:

1,3,7,15,31,(),127,255括号里填多少

1,3,7,15,31,(63),127,255
3=1+2
7=3+4
15=7+8
31=15+16
(63)=31+32
127=63+64
255=127+128