@[Simon_Lu](/user/222555) 要加一个特判
```cpp
if (k == 1)
ans /= 2;
```
by Jasper08 @ 2022-06-10 23:38:37
六六六
by linixiang @ 2022-07-21 20:42:18
live会出现偶像solo的情况（K=1)
by YukiSetsuna @ 2022-09-21 13:07:01