#include <cstdio>
#include <algorithm>
#include <string>
#include <queue>
#include <vector>
#define maxn 1<<16
#define oo 0x3f3f3f3f

using namespace std;

int H[maxn], n, m, T, d[maxn], d1[maxn];

struct nod{int nd, w; nod(int _nd, int _w){nd=_nd; w=_w;};};

vector<vector<nod> >a;


bool operator<(const nod &a, const nod &b) 
{
	if(a.w<b.w) return 1;
	//if(a.w==b.w) if(a.nd<b.nd) return 1;
	return 0;
}
bool operator>(const nod &a, const nod &b)
{
	if(a.w>b.w) return 1;
	return 0;
}


void dijkstra(int s)
{
	priority_queue<nod>Q;
	bool viz[maxn];
	int u, i;
	vector<nod>::iterator it;
	memset(viz, 0, sizeof(viz));
	memset(d, oo, sizeof(d));
	
	Q.push(nod(s, 0));
	
	d[s]=0;
	int nh=n;
	while(Q.size() && nh)
	{
		u=Q.top().nd; Q.pop();
		if(viz[u])continue;
		viz[u]=1;
		nh--;
		for(it=a[u].begin();it!=a[u].end();++it)
			if(d[u]+it->w<d[it->nd])
			{
				d[it->nd]=d[u]+it->w;
				Q.push(*it);
			}
	}

}


int main()
{
freopen("distante.in", "r", stdin);
	freopen("distante.out", "w", stdout);
	int i, j,p, q, w, s;
	scanf("%d", &T);
	for(i=1;i<=T;i++)
	{	
		a.clear();
		scanf("%d %d %d\n", &n, &m, &s);
		a.resize(n+1);
		for(j=1;j<=n;j++) scanf("%d ", d1+j);
		for(j=1;j<=m;j++)
		{
			scanf("%d %d %d\n", &p, &q, &w);
			a[p].push_back(nod(q, w));
			a[q].push_back(nod(p, w));
		}
		dijkstra(s);
		int ok=1;
		
	//	for(j=1;j<=n;j++) printf("%d ", d[j]); printf("\n");
		for(j=1;j<=n;j++) if(d1[j]!=d[j]){ ok=0; break;}
		if(ok) printf("DA\n");
			else printf("NU\n");
	}
	return 0;
}