用的是C++14
by laijingnian @ 2023-08-14 21:08:51
@[laijingnian](/user/757432) 因为 unordered_map 在一个单独的头文件里
by Sprague_Garundy @ 2023-08-14 21:10:51
要
```cpp
#include <unordered_map>
```
@[laijingnian](/user/757432)
by DAMDAM @ 2023-08-14 21:11:23
靠
脑子抽了，头文件没写
by laijingnian @ 2023-08-14 21:12:34
谢大佬帮助
by laijingnian @ 2023-08-14 21:13:26