#include<stdio.h>
int t,i,j,c,n,m,s,l,d[50001],k;
int main() {
	freopen("distante.in","r",stdin),freopen("distante.out","w",stdout),scanf("%d",&t);
	while(t--) {
        scanf("%d%d%d",&n,&m,&s);
      	for(i=1;i<=n;i++)
            scanf("%d",d+i);
      	for(l=d[s]?0:1,k=0;k<m;k++) {
            scanf("%d%d%d",&i,&j,&c);
            if(d[i]+c<d[j]||d[j]+c<d[i])
                l=0;
      	}
        printf("%s\n",l?"DA":"NU");
	}
}