#include <fstream>
#include <vector>
#include <set>
#define DIM 50001
#define INF 1000000001
using namespace std;
ifstream cin("distante.in");
ofstream cout("distante.out");
int n,p,x,y,c,d[DIM],t,f,m,ok,i,v[DIM];
vector<pair<int,int> > l[DIM];
set<pair<int,int> > s;
int main()
{
    cin>>t;
    for(f=1; f<=t; f++)
    {
        cin>>n>>m>>p;
        ok=0;
        for(i=1; i<=n; i++)
        {
            cin>>v[i];
            l[i].clear();
        }
        for(i=1; i<=m; i++)
        {
            cin>>x>>y>>c;
            l[x].push_back(make_pair(y,c));
            l[y].push_back(make_pair(x,c));
        }
        for (int i=1; i<=n; i++)
        {
            d[i]=INF;
        }
        d[p]=0;
        s.insert(make_pair(0,p));
        while (!s.empty())
        {
            int nod=s.begin()->second;
            s.erase(s.begin());
            for (int i=0; i<l[nod].size(); i++)
            {
                int vec=l[nod][i].first;
                int cost=l[nod][i].second;
                if (d[nod]+cost<d[vec])
                {
                    s.erase(make_pair(d[vec],vec));
                    d[vec]=d[nod]+cost;
                    s.insert(make_pair(d[vec],vec));
                }
            }
        }
        for (int i=1; i<=n; i++)
        {
            if(d[i]!=v[i])
            {
                ok=1;
                break;
            }
        }
        if(ok==1) cout<<"NU"<<'\n';
        else cout<<"DA"<<'\n';
    }
    return 0;
}