建议坐标全体+2
不然数组容易越界
by Ravener @ 2024-04-18 20:15:48
@[wang_zi_yi_233](/user/1168953)
by Ravener @ 2024-04-18 20:16:00
还是 $60$ 分
by wang_zi_yi_233 @ 2024-04-19 06:32:38
```cpp
#include<bits/stdc++.h>
using namespace std;
int dx[]={0,2,1,-1,-2,-2,-1,1,2};
int dy[]={0,1,2,2,1,-1,-2,-2,-1};
bool b[105][105];
long long p[105][105];
int main()
{
int n,m,mx,my;
scanf("%d %d %d %d",&n,&m,&mx,&my);
n+=2;
m+=2;
mx+=2;
my+=2;
for(int i=0;i<=8;i++)
{
int x=mx+dx[i];
int y=my+dy[i];
if(x>=2 && x<=n && y>=2 && y<=m) b[x][y]=1;
}
p[2][2]=1;
for(int i=2;i<=n;i++)
{
for(int j=2;j<=m;j++)
{
if(b[i][j]==0)
{
if(i==2 && j==2) continue;
if(i==2) p[i][j]=p[i][j-1];
if(j==2) p[i][j]=p[i-1][j];
if(i!=2 && j!=2) p[i][j]=p[i-1][j]+p[i][j-1];
}
}
}
printf("%d",p[n][m]);
return 0;
}
```
by wang_zi_yi_233 @ 2024-04-19 06:33:52
没看见 **long long** 啊！！！！！给后代一个警示！！！！！
by wang_zi_yi_233 @ 2024-04-19 06:42:00
看下评测记录
by hujiarui140608 @ 2024-04-22 21:14:34