$k\le 2^{64}$ 要开unsigned long long
by Dream_weavers @ 2022-06-23 08:01:36
说错了是 $0\le k<2^{64}$
by Dream_weavers @ 2022-06-23 08:02:18
@[Dream_weavers](/user/572482) 修改了之后是90分
by Simon_Lu @ 2022-06-23 13:04:43
@[Dream_weavers](/user/572482) #17和#20WA了
by Simon_Lu @ 2022-06-23 13:06:01