```cpp
#include <bits/stdc++.h>
using namespace std;
long long a[25][25];//int小了用long long;
int n,m,x,y;
int main(){
cin>>n>>m>>x>>y;
for(int i=0;i<=n;i++){
for(int j=0;j<=m;j++){
a[i][j]=1;
}
}
a[x][y]=0;
if(x-1>=0 && y-2>=0) a[x-1][y-2]=0;
if(x-2>=0 && y-1>=0) a[x-2][y-1]=0;
if(x-2>=0 && y+1<=m) a[x-2][y+1]=0;
if(x-1>=0 && y+2<=m) a[x-1][y+2]=0;
if(x+1<=n && y+2<=m) a[x+1][y+2]=0;
if(x+2<=n && y+1<=m) a[x+2][y+1]=0;
if(x+2<=n && y-1>=0) a[x+2][y-1]=0;
if(x+1<=n && y-2>=0) a[x+1][y-2]=0;
for(int i=0;i<=n;i++)
{
for(int j=0;j<= m;j++)
{
if(i==0 && j==0)
{
continue;
}
if(a[i][j]==0)
{
continue;
}
if(i==0)
{
a[i][j]=a[i][j-1];
}
else if(j==0)
{
a[i][j]=a[i-1][j];
}
else
{
a[i][j]=a[i-1][j]+a[i][j-1];
}
}
}
cout<<a[n][m];
return 0;
}
```
AC代码
by MC00101 @ 2023-05-27 19:31:55
**测试点信息:**
- 4ms/736.00KB
1. AC
#1
Accepted, 得分 20.ok accepted
3ms/808.00KB
2. AC
#2
Accepted, 得分 20.ok accepted
3ms/684.00KB
3. AC
#3
Accepted, 得分 20.ok accepted
3ms/808.00KB
4. AC
#4
Accepted, 得分 20.ok accepted
3ms/808.00KB
5. AC
#5
Accepted, 得分 20.ok accepted
by MC00101 @ 2023-05-27 19:39:02
- P1002 [NOIP2002 普及组] 过河卒
by MC00101 @ 2023-05-27 19:41:02