```cpp
#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,m,x,y,dp[1001][1001];
bool check(int x2,int y2){
return (x2==x+1&&y2==y+2)||(x2==x-1&&y2==y+2)||(x2==x+1&&y2==y-2)||(x2==x-1&&y2==y+-2)||(x2==x+2&&y2==y+1)||(x2==x+2&&y2==y-1)||(x2==x-2&&y2==y+1)||(x2==x-2&&y2==y-1)||(x2==x&&y2==y);
}
signed main(){
cin>>n>>m>>x>>y;
x++,y++;
dp[1][1]=1;
for(int i=1;i<=n+1;i++){
for(int j=1;j<=m+1;j++){
if(!check(i,j)){
dp[i][j+1]+=dp[i][j],dp[i+1][j]+=dp[i][j];
}
}
}
cout<<dp[n+1][m+1];
return 0;
}
```
@[hwyb233](/user/1435213)
by zjr2014 @ 2024-09-20 11:27:39