#include <bits/stdc++.h>
#define NMAX 50005
#define INF 16e5
using namespace std;
ifstream f("distante.in");
ofstream g("distante.out");

vector<pair<int,int> > G[NMAX];
vector<pair<int,int> >::iterator it;
set<pair<int,int> > h;
int dist[NMAX];
int dis[NMAX];
int t;
int n, m,s;
int from,to,cost;
bool ok;

int main()
{  int i,k;
    f>>t;
    for(k=1;k<=t;k++)
    {f>>n>>m>>s;
     for(i=1;i<=n;i++)
        f>>dis[i],dist[i]=INF;
    for (i=1;i<=m;++i)
    {

     f>>from>>to>>cost;

     G[from].push_back(make_pair(to,cost));

     G[to].push_back(make_pair(from,cost));
    }

dist[s]=0;
h.insert(make_pair(0,s));
int node;
    while (!h.empty())
  {
  node=h.begin()->second;

   h.erase(h.begin());

  for(it=G[node].begin();it!=G[node].end();++it)
 {
   to=it->first;
   cost=it->second;

  if (dist[to]>dist[node]+cost)
     {
      if (dist[to]!=INF) h.erase(h.find(make_pair(dist[to],to)));

      dist[to]=dist[node]+cost;

      h.insert(make_pair(dist[to],to));
     }
 }

  }
    ok=1;
    for (i=1;i<=n;++i)
    if(dist[i]!=dis[i]){ok=0;break;}
    if(ok==1)g<<"DA\n";
     else g<<"NU\n";
     }

}