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#include <bits/stdc++.h>
#define Nax 100001
long long t,n,m,nr,tribut,x;
long long v[Nax];
unsigned long long s;
using namespace std;
ifstream fin("tribut.in");
ofstream fout("tribut.out");
int main()
{
fin>>t;
while(t--)
{
fin>>n>>m; s=0;
for(int i=1;i<=n;i++)
fin>>v[i];
for(int i=1;i<=m;i++)
{
fin>>nr>>tribut;
for(int j=1;j<=nr;j++)
{
fin>>x;
int y=min(tribut,v[x]);
s+=y;
v[x]-=y;
}
}
fout<<s<<'\n';
}
return 0;
}