首先,不要用 `pow(2,n)`, 精度时间两开花
用 `1ll << n` 代替
by Hirasawa_Yui @ 2020-03-05 09:21:27
好的我试试
by bovine__kebi @ 2020-03-05 09:22:51
@[Harrya_Gryffindor](/user/138126)
AC了谢谢大佬,还有,能跟我讲讲1<<n是什么原理吗?
by bovine__kebi @ 2020-03-05 09:30:41
@[bovine__kebi](/user/294736) 位运算
by SUNCHAOYI @ 2020-03-05 09:49:02
我谔谔
by bovine__kebi @ 2020-03-05 10:34:50