???
by ZZ_peng09 @ 2021-03-01 20:44:24
Cu问，代码基本一致
by Zwart_hout @ 2022-01-03 13:18:23
我的解决了，问题是string即使声明为全局变量也不会初始化为空串，
```cpp
string s = "";
```
就AC了
by Zwart_hout @ 2022-01-03 13:29:56