#include <fstream>
#include <queue>
#include <vector>

using namespace std;
ifstream cin ("distante.in");
ofstream cout ("distante.out");
long long t,n,m,s,x,y,z;
struct el
{
    int nod,cost;
    bool operator < (const el &A) const{
        return cost > A.cost;
    }
};
priority_queue < el > q;
vector < el > v[500005];
long long distante[500005];
long long valori_distante[500005];
void Dijkstra(int s)
{
    q.push({s,0});
    while (!q.empty())
    {
        int valoare=q.top().cost;
        int nod=q.top().nod;
        for (int i=0;i<v[nod].size();i++)
        {
            el vecin=v[nod][i];
            if ((distante[nod]+vecin.cost< distante[vecin.nod]) || (distante[vecin.nod]==0))
            {
                distante[vecin.nod]=distante[nod]+vecin.cost;
                q.push({vecin.nod,distante[vecin.nod]});
            }
        }
        q.pop();
    }
}
int main()
{
    cin >> t;
    for (int i=1;i<=t;i++)
    {

        cin >> n >> m >> s;
        for (int j=1;j<=n;j++)
        {
            cin >> valori_distante[j];
        }
        for (int j=1;j<=m;j++)
        {
            cin >> x >> y >> z;
            v[x].push_back({y,z});
            v[y].push_back({x,z});
        }
        Dijkstra(s);
        ///for (int j=1;j<=n;j++) cout << distante[j] << " ";
        int j=1;
        while ((distante[j]==valori_distante[j] && j<=n) || j==s) j++;
        if (j==n+1) cout << "DA";
        else cout << "NU";
        cout << '\n';
        for (int j=1;j<=n;j++)
        {
            v[j].clear();distante[j]=0;
        }
    }

    return 0;
}