bfs里面vis的初始化错了,这个题n,m和板子是反的
```cpp
for(long long i=1; i<=m; i++) dis[i]=inf;
```
改成这样应该就对了
by _qingshu_ @ 2023-10-30 11:06:30
@[Aakkosetsumussa](/user/400468)
by _qingshu_ @ 2023-10-30 11:07:33