@[阿炜](/user/321647) `j <= t`。 by Usada_Pekora @ 2022-10-13 18:27:06
```c++ for(int j=1; j<=n; j++) ``` 好家伙，$2^n$，不RE才怪 by ImposterAnYu @ 2022-10-13 18:45:21