```
#include<bits/stdc++.h>
using namespace std;
int qp[21][21];
int n,m,hn,hm;
int main()
{
cin>>n>>m>>hn>>hm;
for(int i=0;i<=20;i++)
{
qp[0][i]=qp[i][0]=1;
}
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
for(int ii=1;ii<=n;ii++)
{
for(int j=1;j<=m;j++)
{
qp[ii][j]=qp[ii-1][j]+qp[ii][j-1];
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
}
}
cout<<qp[n][m];
}
```
```
#include<bits/stdc++.h>
using namespace std;
int qp[21][21];
int n,m,hn,hm;
int main()
{
cin>>n>>m>>hn>>hm;
for(int i=0;i<=20;i++)
{
qp[0][i]=qp[i][0]=1;
}
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
for(int ii=1;ii<=n;ii++)
{
for(int j=1;j<=m;j++)
{
qp[ii][j]=qp[ii-1][j]+qp[ii][j-1];
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
}
}
cout<<qp[n][m];
}
```
```
#include<bits/stdc++.h>
using namespace std;
int qp[21][21];
int n,m,hn,hm;
int main()
{
cin>>n>>m>>hn>>hm;
for(int i=0;i<=20;i++)
{
qp[0][i]=qp[i][0]=1;
}
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
for(int ii=1;ii<=n;ii++)
{
for(int j=1;j<=m;j++)
{
qp[ii][j]=qp[ii-1][j]+qp[ii][j-1];
qp[hn-2][hm-1]=qp[hn-2][hm+1]=0;
qp[hn+2][hm+1]=qp[hn+2][hm-1]=0;
qp[hn-1][hm-2]=qp[hn-1][hm+2]=0;
qp[hn+1][hm+2]=qp[hn+1][hm-2]=0;
}
}
cout<<qp[n][m];
}
```
by 麟落 @ 2021-08-09 10:06:11
不是过了吗
by lion0514 @ 2021-08-09 10:16:04
这么多代码？
by 林志艺 @ 2021-08-15 15:59:42