#include <bits/stdc++.h>
#include <iostream>
#include <fstream>


using namespace std;
ifstream fin("distante.in");
ofstream gout("distante.out");

int distante_de_verificat[50001];
int Dist[50001];
bool parcurs[50001];

int main()
{

    int t,n,m,s,x,a,b,c;
    fin>>t;
    for(int i = 1; i <= t; i ++)
    {
        vector< vector<pair<int, int> > > lista_ad;
        priority_queue <pair<int, int>, vector <pair<int,int> >, greater <pair<int,int> > > coada;

        int ok = 1;
        fin>>n>>m>>s;
        lista_ad.resize(n+1);
        for(int j = 1; j<= n; j++)
        {
            fin>>x;
            distante_de_verificat[j] = x;
        }
        for ( int i = 0; i < m; i++ )
            {
                fin >> a >> b >>c;
                lista_ad[a].push_back(make_pair(b,c));
                lista_ad[b].push_back(make_pair(a,c));
            }

        coada.push(make_pair(0,s));

        for(int i = 1; i<= n;i++)
        {
            Dist[i] = 10000000;
            parcurs[i] = 0;
        }
        Dist[s] = 0;
        while (!coada.empty())
        {
            int curr = coada.top().second;
            if(parcurs[curr] == 1)
                continue;
             parcurs[curr] = 1;
             coada.pop();


            for(int i = 0; i < lista_ad[curr].size();i++)
                {
                    if(Dist[curr] + lista_ad[curr][i].second < Dist[lista_ad[curr][i].first])
                    {

                        Dist[lista_ad[curr][i].first]=Dist[curr]+lista_ad[curr][i].second;
                        coada.push(make_pair(Dist[lista_ad[curr][i].first],  lista_ad[curr][i].first));
                    }
                }
        }
        for(int i = 1; i <= n; i++)
            {
                if (Dist[i] == 10000000)
                Dist[i] = 0;
                if(Dist[i] == distante_de_verificat[i])
                    ok = 1;
                else
                    ok = 0;
            }

        if(ok == 1)
            gout<<"DA"<<'\n';
        else
            gout<<"NU"<<'\n';
    }


    return 0;
}