@[Ac_forever](/user/768416) 考虑二进制，可能要状压或者bitset
talk is cheap,but i'am weak
by Rem_CandleFire @ 2024-04-12 21:52:50
数位DP @[Ac_forever](/user/768416)
by lnw143 @ 2024-04-13 08:11:15
@[Ac_forever](/user/768416) 我觉得是位运算及其前缀和
by qwertyuiop951357 @ 2024-04-13 08:18:09