#include <algorithm>
#include <fstream>
#include <cstring>
#include <cassert>
#include <vector>
#include <set>
#include <iostream>
using namespace std;

const int NMAX = 50005;
const int INF = 0x3f3f3f3f;

vector<pair<int,int> > G[NMAX];
set<pair<int,int> > h;
vector<pair<int,int> >::iterator it;
int dist[NMAX];
int dis[NMAX];
 ifstream f("distante.in");
 ofstream g("distante.out");

int main()
{    int t;
    int n, m,s;
    f>>t;
    for(int k=1;k<=t;k++)
    {f>>n>>m>>s;
     for(int i=1;i<=n;i++)
        f>>dis[i];
    for (int i=1;i<=m;++i)
    {int from,to,cost;
     f>>from>>to>>cost;
     G[from].push_back(make_pair(to,cost));
     G[to].push_back(make_pair(from,cost));
    }
memset(dist,INF,sizeof dist);
dist[s]=0;
h.insert(make_pair(0,s));
    while (!h.empty())
  {int node=h.begin()->second;
 int d=h.begin()->first;
 h.erase(h.begin());
 for(it=G[node].begin();it!=G[node].end();++it)
{int to=it->first;
   int 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));
     }
}

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

}