fake。
by 樱洛CHANGE @ 2020-09-11 19:10:51
fake。
by Rikka__ @ 2020-09-11 19:12:08
0基础-->4黑
by 迷残云 @ 2020-09-11 19:18:29
它求的是mp[n][m]，您输出mp[n+1][m+1]，当然是0啦/kel
### 解决方案
输出语句，mp[n+1][m+1]改成mp[n][m]即可
##### 上代码
```cpp
#include<bits/stdc++.h>
using namespace std;
int n,m,a,b;
int too[2][2]={0,-1,-1,0};
long long f[100][100],mp[100][100];
int main() {
cin>>n>>m>>a>>b;
a+=1;
b+=1;
mp[a][b]++;
mp[a-2][b-1]++;
mp[a-2][b+1]++;
mp[a+2][b-1]++;
mp[a+2][b+1]++;
mp[a-1][b+2]++;
mp[a-1][b-2]++;
mp[a+1][b-2]++;
mp[a+1][b+2]++;
f[1][1]=1;
for(int i=1;i<=n;i++) {
for(int j=1;j<=m;j++) {
if(mp[i][j]) continue;
f[i][j]+=f[i-1][j]+f[i][j-1];
}
}
cout<<f[n][m];
return 0;
}
```
by Return_ @ 2020-09-11 19:22:01
@[Return_](/user/175273) wcsl/kk
by Return_ @ 2020-09-11 19:23:47
@[Return_](/user/175273) %%
但方案好像行不通~~（雾~~
by PrefixAMS @ 2020-09-16 10:35:23