#include <stdio.h>
#define nmax 50005
#define inf 2000000000
struct graf
{
	long vi,vf,cost;
}q[100005];
long d[nmax],n,m,dd[nmax];

void ford(long s)
{
	int p=1;
	long i,j,a,b,c;
	for (i=1;i<=n;i++)
		if (i!=s) d[i]=inf;
	d[s]=0;
	i=1;
	while (i<n&&p)
	{
		p=0;
		for (j=1;j<=m;j++)
		{
			a=q[j].vi;
			b=q[j].vf;
			c=q[j].cost;
			if (d[b]>d[a]+c)
			{
				d[b]=d[a]+c;
				p=1;
			}
		}
	}
}

int main()
{
	long t,i,p,x,y,z;
	long s,j;
	freopen("distante.in","r",stdin);
	freopen("distante.out","w",stdout);
	scanf("%ld",&t);
	for (i=1;i<=t;i++)
	{
		scanf("%ld%ld%ld",&n,&m,&s);
		p=1;
		for (j=1;j<=n;j++)
			scanf("%ld",&dd[j]);
		for (j=1;j<=m;j++)
		{
			scanf("%ld%ld%ld",&x,&y,&z);
			q[j].vi=x;
			q[j].vf=y;
			q[j].cost=z;
		}
		
		ford(s);
		
		for (j=1;j<=n;j++)
		{
			if (d[j]==inf) d[j]=0;
			if (dd[j]!=d[j]) p=0;
		}
		if (p) printf("DA\n");
			else printf("NU\n");
	}
		
	return 0;
}