#include <cstdio>
#include <vector>
#define NMAX 55001
#define POS 90001
#define INF 1000000000
using namespace std;
void initializare();
void citire();
void rezolvare();
void scrie();
int T;
int C[POS];
int N,M,INC;
vector<int> G[NMAX],H[NMAX];
int COADA[POS],NR=0;
int VAL[POS];
bool bou=0;

int main()
{
	freopen("distante.in","r",stdin);
	freopen("distante.out","w",stdout);
	scanf("%d",&T);
	for(int i=1;i<=T;i++)
	{
		initializare();
		citire();
		rezolvare();
		scrie();
	}
		
	return 0;
}

void initializare()
{
	for(int i=1;i<=NMAX;i++)
		VAL[i]=INF;
}

void citire()
{
	int x,y,v;
	scanf("%d %d %d",&N,&M,&INC);
	VAL[INC]=0;
	for(int i=1;i<=N;i++)
		scanf("%d",&C[i]);
	for(int i=1;i<=M;i++)
	{
		scanf("%d %d %d",&x,&y,&v);
		G[x].push_back(y);
		H[x].push_back(v);
	}
		
}

void rezolvare()
{
	vector<int>::iterator it,ih;
	
	for( it=G[INC].begin(), ih=H[INC].begin(); it!=G[INC].end() ;it++,ih++)
	{
		COADA[++NR]=*it;
		VAL[COADA[NR]]=*ih;
	}
	
	for(int i=1;i<=NR;i++)
		for( it=G[COADA[i]].begin(), ih=H[COADA[i]].begin(); it!=G[COADA[i]].end() ;it++,ih++)
			if(*ih+VAL[COADA[i]]<VAL[*it])
			{
				COADA[++NR]=*it;
				VAL[COADA[NR]]=*ih+VAL[COADA[i]];
			}
}

void scrie()
{
	
	for(int i=2;i<=N;i++)
		if(VAL[i]!=C[i])
		{
			printf("NU\n");
			return;
		}
	printf("DA\n");

}