@[LeTu_Jun](/user/474235)
```cpp
if(j == 1)
f[i][j] = f[i - 1][n] + f[i - 1][2];
else if(j == n)
f[i][j] = f[i - 1][1] + f[i -1 ][n - 1];
else
f[i][j] = f[i - 1][j - 1] + f[i - 1][j + 1];
```
for循环中间改成这个，f是我自己申请的数组名，你改成你申请的dp就行了
by Vanishing_Stars @ 2022-09-10 11:16:35
@[CODE_SUPERVISOR](/user/786586) 谢谢 dalao，已 AC
by LeTu_Jun @ 2022-09-10 11:36:47