#include    <iostream>
#include    <fstream>
#include    <queue>
#include    <vector>
 
using namespace std;
 
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
 
const int NMax = 50005;
const int oo = (1 << 30);
 
int N, M,S;
int D[NMax],DS[NMax];
bool InCoada[NMax];
 
vector < pair < int, int > > G[NMax];
 
struct comparaDistante
{
    bool operator()(int x, int y)
    {
        return D[x] > D[y];
    }
};
 
priority_queue < int, vector < int >, comparaDistante> Coada;
 
void Citeste()
{
    fin >> N >> M>>S;
    for(int i=1;i<=N;i++){
    	fin >>DS[i];
	}
    for(int i = 1; i <= M; i++)
    {
        int x, y, c;
        fin >> x >> y >> c;
        G[x].push_back(make_pair(y,c));
    }
}
 
void Dijkstra(int nodStart)
{
    for(int i = 1; i <= N; i++)
        D[i] = oo;
 
    D[nodStart] = 0;
    Coada.push(nodStart);
    InCoada[nodStart] = true;
    while(!Coada.empty())
    {
        int nodCurent = Coada.top();
        Coada.pop();
        InCoada[nodCurent] = false;
 
        for(size_t i = 0; i < G[nodCurent].size(); i++)
        {
            int Vecin = G[nodCurent][i].first;
            int Cost = G[nodCurent][i].second;
            if(D[nodCurent] + Cost < D[Vecin])
            {
                D[Vecin] = D[nodCurent] + Cost;
                if(InCoada[Vecin] == false)
                {
                    Coada.push(Vecin);
                    InCoada[Vecin] = true;
                }
            }
        }
    }
}
 
void Afiseaza()
{
	bool da=0;
    for(int i = 2; i <= N; i++)
    {
       if(D[i] != DS[i]){
       	fout <<"NU"<<"\n";
       	da=1;
       	break;
	   }
    }
    if(!da)fout <<"DA"<<"\n";
}
 
int main()
{
   int tt;
   fin >>tt;
   while(tt--){
   	Citeste();
   	Dijkstra(S);
   	Afiseaza();
   	
   }
}