@[MloVtry](/space/show?uid=35718)
附上题解：
```cpp
#include<iostream>
#include<cstdio>
#define ll long long
ll a,b,n,m,l[22][22],map[23][23];//map需要开大点QwQ
using namespace std;
void bj(ll x,ll y)//标记马的控制点
{
map[x][y]=1;
map[x-1][y-2]=1;
map[x-2][y-1]=1;
map[x-2][y+1]=1;
map[x-1][y+2]=1;
map[x+1][y-2]=1;
map[x+2][y-1]=1;
map[x+2][y+1]=1;
map[x+1][y+2]=1;
}
int main()
{
scanf("%lld%lld%lld%lld",&n,&m,&a,&b);
bj(a,b);
l[1][0]=1;//为了把应该有一步的一步给过去
for(int i=1;i<=n+1;++i)
{
for(int j=1;j<=m+1;++j)
{
l[i][j]=l[i-1][j]+l[i][j-1];//一个点的路径来自左方与上方
if(map[i-1][j-1]) l[i][j]=0;//如果被马控制那么是0
}
}
printf("%lld",l[n+1][m+1]);//整体向右下挪一下
return 0;
}
```
by HQK_TJU @ 2017-10-23 16:19:41
@[Sir\_HQK](/space/show?uid=51309)
把数组定义在主函数外试试
by 日月影 @ 2017-10-23 17:36:12
@[日月影](/space/show?uid=22236) Why?
by HQK_TJU @ 2017-10-23 20:19:04
谢谢大佬们
@[日月影](/space/show?uid=22236)
@[MloVtry](/space/show?uid=35718)
通过了
by HQK_TJU @ 2017-10-23 20:28:03
@[日月影](/space/show?uid=22236) You're Right...
by HQK_TJU @ 2017-10-23 20:32:27
以后如果要开大数组，最好定义在函数外
by 日月影 @ 2017-10-23 21:13:52