可以
```
青蛙允许从左岸 A 直接跳到河心的石墩、荷叶和右岸的石墩 D 上，允许从河心的石墩和荷叶跳到右岸的石墩 D 上；
```
by Forgotten_0x1328FB6 @ 2023-12-16 21:45:33
```cpp
#include<bits/stdc++.h>
using namespace std;
int n,m,f[25][1005];
int main()
{
cin>>n>>m;
f[n][0]=2*n;
f[0][m]=m+1;
for (int i=1;i<=n;i++)
for (int j=1;j<=m;j++)
f[i][j]=max(2*f[i-1][j],f[i][j-1]+1);
cout<<f[n][m];
return 0;
}
by Yang_Yihang @ 2024-01-31 20:32:32