把
```cpp
if(hill[x2][y2]<=hill[x][y]&&x2>=1&&x2<=n&&y2>=1&&y2<=m&&len+1>height[x2][y2])ss(x2,y2,len+1);
```
改成
```cpp
if(hill[x2][y2]<hill[x][y]&&x2>=1&&x2<=n&&y2>=1&&y2<=m&&len+1>height[x2][y2])ss(x2,y2,len+1);
```
by abcaawtq @ 2023-09-23 22:51:20
实测AC
by abcaawtq @ 2023-09-23 22:51:49
@[JiuZhE66666](/user/1049051)
by abcaawtq @ 2023-09-23 22:55:09
@[abcaawtq](/user/702161) 感谢！
by JiuZhE66666 @ 2023-09-24 11:44:37