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

using namespace std;

int inf = 2 * 1e9;

ifstream f("distante.in");
ofstream g("distante.out");

vector <pair <int ,int>> graf[50010];
int dist [50010];
bool verif[50010];

struct cmp{
    bool operator()(int a, int b)
    {
        return dist[a] > dist[b];
    }
};

void dijkstra(int k)
{
    verif[k] = true;
    priority_queue <int, vector <int>, cmp> pq;
    dist[k] = 0;
    pq.push(k);
    while(!pq.empty())
    {
        int nod = pq.top();
        pq.pop();
        for(auto t : graf[nod])
            if(dist[nod] + t.second < dist[t.first])
            {
                dist[t.first] = dist[nod] + t.second;
                if(!verif[t.first])
                {
                    verif[t.first] = true;
                    pq.push(t.first);
                }
            }
    }
}

int main()
{
    int t;
    f >> t;
    while(t--)
    {
        int n, m, s;
        f >> n >> m >> s;
        vector <int> sol(n);
        for(int i = 0 ; i < n; ++i)
            f >> sol[i];
        fill(dist, dist + 50000, inf);
        fill(verif, verif + 50000, false);
        int x, y, c;
        for(int i = 0; i < m; ++i)
        {
            f >> x >> y >> c;
            graf[x].push_back({y, c});
        }
        dijkstra(s);
        bool ok = true;
        for(int i = 1; i <= n; ++i)
            if(sol[i - 1] != dist[i])
                ok = false;
        if(ok)
            cout << "DA";
        else
            cout << "NU";
        cout << '\n';
    }
    return 0;
}