#include <iostream>
#include <queue>
#include <vector>

#define NMAX 50000
#define INFINIT 1000000000

using namespace std;

struct muchie {
  int to ;
  int cost ;
  bool operator < (const muchie& a) const {
    return this->cost > a.cost ;
  }
};

int distgigel [ NMAX + 1 ] ;
vector<muchie> g [ NMAX + 1 ] ;
int mydist [ NMAX + 1 ] ;

bool dijkstra (int n, int sursa ) {
  int i ;
  for (i = 1 ; i <= n ; i++ )
    mydist[i] = INFINIT ;
  priority_queue<muchie> q ;
  mydist[sursa] = 0 ;
  for (auto elem : g[sursa] )
    q.push({elem.to, elem.cost+mydist[sursa]}) ;
  while (!q.empty()) {
    if (mydist[q.top().to] == INFINIT ) {
      int next = q.top().to ;
      int val = q.top().cost ;
      mydist[next] = val ;
      q.pop() ;
      for (auto elem : g[next])
        if (mydist[elem.to] == INFINIT )
          q.push({elem.to, val+elem.cost}) ;
    }
    else
      q.pop() ;
  }
  i = 1 ;
  while ( i <= n && mydist[i] == distgigel[i] )
    i++;
  return (i > n ) ;
}

int main() {
  FILE *fin, *fout ;
  fin = fopen ("distante.in", "r" ) ;
  fout = fopen ("distante.out", "w" ) ;
  int n, t, s, m, i, c, a, b ;
  fscanf (fin, "%d", &t ) ;
  while (t > 0 ) {
    fscanf (fin, "%d%d%d", &n, &m, &s ) ;
    for (i = 1 ; i <= n ; i++ )
      fscanf (fin, "%d", &distgigel[i] ) ;
    for (i = 1 ; i <= m ; i++ ) {
      fscanf (fin, "%d%d%d", &a, &b, &c ) ;
      g[a].push_back({b, c}) ;
      g[b].push_back({a, c}) ;
    }
    if (dijkstra(n, s))
      fprintf (fout, "DA\n" ) ;
    else
      fprintf (fout, "NU\n" ) ;
    for (i = 1 ; i <= n ; i++ )
      g[i].clear() ;
    t--;
  }
  return 0;
}