p/jzr0xo

@moonmyth

Mon, May 5, 2014 2:47 PM

討厭演算法= =

@baipu

說

Mon, May 5, 2014 2:47 PM

拍拍

@0inschoy

說

Mon, May 5, 2014 2:47 PM

就像我討厭教統一樣..................................................

@moonmyth

Mon, May 5, 2014 2:49 PM

差點連等比求和都算不出來，只有公式記牢牢但一代進去就打結了= =

@moonmyth

Mon, May 5, 2014 2:50 PM

哪來的2^(k-1)啊啊啊啊(翻桌