#include <bits/stdc++.h>
using namespace std;

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

const int Nmax = 5e4 + 50;

vector < pair < int, int > > G[Nmax];
int dist[Nmax], dist_bronzarel[Nmax];
bool viz[Nmax];

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

void Dijkstra(int src)
{
    priority_queue < int, vector < int >, cmp > pq;
    pq.push(src);
    viz[src] = true;

    while(!pq.empty()) {
        int node = pq.top(); pq.pop();
        viz[node] = false;

        for(const auto it: G[node]) {
            if(dist[node] + it.second < dist[it.first]) {
                dist[it.first] = dist[node] + it.second;

                if(viz[it.first] == false) {
                    pq.push(it.first);
                    viz[it.first] = true;
                }
            }
        }
    }
}

int main()
{

    int T;

    in >> T;
    for(int i = 1; i <= T; ++i) {
        int n, m, src;
        in >> n >> m >> src;

        for(int j = 1; j <= n; ++j) in >> dist_bronzarel[j];

        for(int j = 1; j <= n; ++j)
            G[j].clear();

        for(int j = 1; j <= m; ++j) {
            int a, b, c;
            in >> a >> b >> c;

            G[a].push_back({b, c});
            G[b].push_back({a, c});
        }

        for(int j = 1; j <= n; ++j)
            if(j != src)
                dist[j] = INT_MAX;

        Dijkstra(src);

        for(int j = 1; j <= n; ++j)
            if(dist[j] == INT_MAX)
                dist[j] = 0;

        bool ok = true;
        for(int j = 1; j <= n; ++j)
            if(dist[j] != dist_bronzarel[j]) {
                out << "NU\n";
                ok = false;
                break;
            }

        if(ok == true)
            out << "DA\n";
    }

    return 0;
}