6,看完后过了
by LIjintong @ 2024-03-16 08:59:05
```cpp
opt=getchar();
while(opt!='C'&&opt!='M') opt=getchar();
```
by liyujiang @ 2024-04-25 15:08:40
洛谷特有的/n/r哈哈哈
by pezhzh @ 2024-05-13 15:54:27