@[AAA404](/user/723198)
In:
```txt
2 1
2 1
1 2 1
```
Out:
```
0
```
by qwef_ @ 2023-08-11 22:17:28
@[qwef_](/user/819212) 神！%%%
by wukaichen888 @ 2023-08-11 22:26:58
@[qwef_](/user/819212) thx，明天测
by AAA404 @ 2023-08-11 22:44:19