#include <fstream>
#include <vector>
#include <queue>
#define INF 100000001
using namespace std;
ifstream fin("distante.in");
ofstream fout("distante.out");
int d[50011],D[50011],s;
bool inq[50011];
vector <pair<int,int>> v[50011];
void bellman_ford()
{
    queue <int> q;
    q.push(s);
    inq[s]=1;
    while(q.empty()==false)
    {
        int k=q.front();
        q.pop();
        inq[k]=0;
        for(int i=0;i<v[k].size();i++)
            if(d[v[k][i].first]>d[k]+v[k][i].second)
        {
            d[v[k][i].first]=d[k]+v[k][i].second;
            if(d[v[k][i].first]<D[v[k][i].first])
                return;
            if(inq[v[k][i].first]==0)
            {
                inq[v[k][i].first]=1;
                q.push(v[k][i].first);
            }
        }
    }
}
int T,t,i,n,m,x,y,z;
int main()
{
    fin>>T;
    for(t=1;t<=T;t++)
    {
        fin>>n>>m>>s;
        for(i=1;i<=n;i++)
        {
            v[i].clear();
            d[i]=INF;
            inq[i]=0;
            fin>>D[i];
        }
        d[s]=0;
        for(i=1;i<=m;i++)
        {
            fin>>x>>y>>z;
            v[x].push_back(make_pair(y,z));
            v[y].push_back(make_pair(x,z));
        }
        bellman_ford();

        bool ok = true;
        for(i=1;i<=n;i++)
            if(d[i]!=D[i])
        {
            fout<<"NU"<<'\n';
            ok = false;
            break;
        }
        if(ok)
            fout<<"DA"<<'\n';
    }
    return 0;
}