是```b[y]-b[x-1]```吧……
by xiaoqian02 @ 2022-10-23 15:46:36
前缀和似乎写反了
by xiaoqian02 @ 2022-10-23 15:49:34
@[xiaoqian02](/user/232460) 谢谢dalao
by Pikacu @ 2022-10-23 16:02:03
但还是不对
by Pikacu @ 2022-10-23 16:02:52
偶尔翻到，是这样的，你把cin>>n>>m改成cin>>m>>n,把sum=b[x]-b[y-1]改成sum=a[y]-a[x-1]就可以过了，如果有帮助的可否给个关注，谢谢了
by SLTLS99 @ 2022-11-05 20:06:09
@[Pikacu](/user/681313)
by SLTLS99 @ 2022-11-05 20:07:51
@[SLTLS99](/user/339897) 互关吧！
by Pikacu @ 2022-11-07 13:15:11
@[SLTLS99](/user/339897) 谢谢大佬了
by Pikacu @ 2022-11-07 13:15:40