可能滚动数组？~~（我是二位前缀和，勿喷，不会）~~
by lym12 @ 2023-12-30 09:20:03
@[cz_awa](/user/246331) 可以不用前缀和
by OldDriverTree @ 2023-12-30 09:34:46
@[OldDriverTree](/user/681036) 感谢dalao！明白了
by cat_lover1 @ 2023-12-30 09:40:17