@[Zxx200611](/user/175590) 这个……sighed main()是什么情况？
by Steven__Chen @ 2020-05-25 13:32:17
@[qym2008](/user/270120) @charlie520也是这么解的,“滑窗”嘛
by Steven__Chen @ 2020-05-25 13:32:52
@[Steven__Chen](/user/186757) 我谔谔，我不清楚这种解法，爬了
by xhQYm @ 2020-05-25 13:33:49
@[Steven__Chen](/user/186757) 因为用了 `#define int long long` ，所以只好用 `signed` 了...
by Zxx200611 @ 2020-05-25 13:33:58
@[Zxx200611](/user/175590) for循环那里最好不要用long long 容易死循环的
by Steven__Chen @ 2020-05-25 13:34:44
@[zhengqinyuan](/user/291481) 序列长度为$k+1$，假设现在是$[a_i,a_{i+k}]$，合为$sum$,那么当区间变为$[a_{i+1},a_{i+k+1}]$时，$sum$ 应变为$sum-a_i+a_{i+k+1}$
by Steven__Chen @ 2020-05-25 13:38:42
@[Steven__Chen](/user/186757) 好像不是 `long long` 的问题，还是RE了。
[评测链接](https://www.luogu.com.cn/record/33879630)
by Zxx200611 @ 2020-05-25 13:42:36
@[Steven__Chen](/user/186757) 哦
by novax @ 2020-05-25 13:43:04
@[Zxx200611](/user/175590) for循环那里的判断条件什么鬼
by Steven__Chen @ 2020-05-25 13:46:17
`for(int l=2,r=k+1;r<=n;l++,r++)`
应该改成这样
by Steven__Chen @ 2020-05-25 13:47:00