代码：

#include <iostream>
#include <cstdio>
#include <cmath>
#include <string>
using namespace std;
int n,m,x,y; 
long long b[30][30];
bool a[30][30];
void work1(){
	a[x][y]=1;
	a[x+1][y+2]=1;
	a[x+2][y+1]=1;
	if(y>=2) a[x+1][y-2]=1;
	if(y>=1) a[x+2][y-1]=1;
	if(x>=1) a[x-1][y+2]=1;
	if(x>=2) a[x-2][y+1]=1;
	if(x>=1&&y>=2) a[x-1][y-2]=1;
	if(x>=2&&y>=1) a[x-2][y-1]=1;
} 
void work2(){
	for(int i=0;i<=n;i++){
		for(int j=0;j<=m;j++){
			if(a[i][j]==0){
				if(i==0 || j==0){
					b[i][j]=1;
				}else{
					b[i][j]=b[i-1][j]+b[i][j-1];
				}
			}
		}
	}
}
int main(){
    cin>>n>>m>>x>>y;
    work1();
    work2();
    cout<<b[n][m];
	return 0;
}

提交记录

请大家帮帮我！