**s=s<<k;**
是什么意思呀？
by xxzxg @ 2017-04-21 21:09:13
@[郭宇恒](/space/show?uid=18158) 左移
by Starduster @ 2017-07-27 08:31:07
纳尼
by lili_flyingcutter @ 2017-09-06 22:30:01
乘2的k次方
by HHCY @ 2017-09-15 12:37:38
我用的pow（）然后卡了2，3测试点
呜呜
by 林雨涵 @ 2019-07-28 16:39:00