#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("distante.in");
ofstream fout("distante.out");
int t,n,m,s,a,b,c,test,i;
int d[50001];
bool ok;
int main()
{
    fin>>t;

    for(test=1;test<=t;++test)
    {
        fin>>n>>m>>s;
        memset(d,sizeof(d),0);
        ok=1;

        for(i=1;i<=n;++i)
            fin>>d[i];

        for(i=1;i<=m;++i)
            {
                fin>>a>>b>>c;
                if(d[a]+c<d[b] || d[b]+c<d[a]) ok=0;
            }
        if(d[s]!=0) ok=0;

        if(ok==0) fout<<"NU"<<"\n";
        else fout<<"DA"<<"\n";


    }
    return 0;
}