```cpp
if(i==1||i==b||j==1||j==a){
```
by Po7ed @ 2024-01-07 12:19:16
@[AlexDT](/user/745934) 应为
```cpp
if(i==1||i==a||j==1||j==b){
```
by Po7ed @ 2024-01-07 12:19:44
你可以试试
```text
7 8 @ 0
```
by Po7ed @ 2024-01-07 12:20:05