@[Alan0518](/user/495376) $in$
```
4011
1 79990
7999 10
-1 -1
10
```
$out$
```
-20
```
~~给个关呗~~
by Nancy_Cherry @ 2023-08-30 10:54:06
谢谢
已关
by Alan0518 @ 2023-08-30 10:54:58