```cpp
#include<bits/stdc++.h>
using namespace std;
const int M=5000;
int n,d[M][M],p,a[M],vis[M],ans=0x3f3f3f3f;
void dfs(int x,int y,int z) {
if(y==p) {
ans=min(ans,z+d[x][n]);
return;
}
for(int i=0; i<p; i++)if(!vis[i]) {
vis[i]=1;
dfs(a[i],y+1,z+d[x][a[i]]);
vis[i]=0;
}
}
int main() {
cin>>n;
for(int i=1; i<=n; i++)
for(int j=1; j<=n; j++)
cin>>d[i][j];
for(int k=1; k<=n; k++)
for(int i=1; i<=n; i++)
for(int j=1; j<=n; j++)
if (d[i][j]>d[i][k]+d[k][j])
{
d[i][j]=d[i][k]+d[k][j];
}
cin>>p;
for(int i=0; i<p; i++) {
cin>>a[i];
if(a[i]==1||vis[a[i]]) {
p--;
i--;
}
vis[a[i]]=1;
}
memset(vis,0,sizeof(vis));
dfs(1,0,0);
cout<<ans;
return 0;
}
```
by Surpersolo @ 2019-08-13 09:55:30
###### 你应该是数据开小了，爆出了
by Surpersolo @ 2019-08-13 09:55:54