你这个地方比较大小不对：
```cpp
0<=(s[i+3]-'0')<=9
```
不能这么写，要分开：
```cpp
(s[i+3]-'0')>=0&&(s[i+3]-'0')<=9
```
你试试，我改了你的代码A掉了
by win10 @ 2021-05-31 23:17:26
谢谢
by Biuld @ 2021-06-05 15:07:51
已经A了
by Biuld @ 2021-06-05 15:10:59