简单ｄｐ
#include <stdio.h>
#include <cstring>
#include <iostream>
#include <map>
using namespace std;
typedef unsigned long long ull;
const int N = 105;
int n, m, a[N];
int s[N][N], dp[2][N];
void pt(int x ){
for(int i = 1; i <= m; i++)printf("%d ", dp[x][i]); puts("");
}
int solve(){
int cur = 0;
if(a[1] < 0)
memset(dp[cur], 0, sizeof dp[cur]);
else
{
memset(dp[cur], -1, sizeof dp[cur]);
dp[cur][a[1]] = 0;
}
for(int i = 2; i <= n; i++)
{
cur ^= 1;
memset(dp[cur], -1, sizeof dp[cur]);
if(a[i]>0)
{
for(int j = 1; j <= m; j++)
if(dp[cur^1][j] != -1)
dp[cur][a[i]] = max(dp[cur][a[i]], dp[cur^1][j] + s[j][a[i]]);
}
else
{
for(int j = 1; j <= m; j++)
if(dp[cur^1][j]!=-1)
for(int k = 1; k <= m; k++)
dp[cur][k] = max(dp[cur][k], dp[cur^1][j]+s[j][k]);
}
// cout<<i<<":"; pt(cur);
}
int ans = 0;
for(int i = 1; i <= m; i++)
ans = max(ans, dp[cur][i]);
return ans;
}
void input(){
cin>>n >> m;
for(int i = 1; i <= m; i++)
for(int j = 1; j <= m; j++)
scanf("%d", &s[i][j]);
for(int i = 1; i <= n; i++) scanf("%d", &a[i]);
}
int main(){
int T; cin>>T;
while(T--){
input();
cout<<solve()<<endl;
}
return 0;
}
/*
9
3 3
1 1 5
5 1 100
1 5 1
-1 -1 -1
*/