#include <fstream>
#include <vector>
using namespace std;

ifstream is("distante.in");
ofstream os("distante.out");

int T, n, m, s, d[50001];
vector<pair<int, int > > G[50001];

bool Read();
bool exista, ok;

int main()
{
    is >> T;
    for ( int t = 0; t < T; ++t )
    {
        ok = true;
        if( Read() )
        {
            for ( int i = 1; i <= n; ++i )
            {
                exista = false;
                for ( const auto& c: G[i] )
                    if ( d[i] + c.second == d[c.first] || d[c.first] + c.second == d[i])
                    {
                        exista = true;
                        break;
                    }
                if ( exista == false )
                {
                    os << "NU\n";
                    ok = false;
                    break;
                }
            }
            if ( ok )
                os << "DA\n";
        }
        else
            os << "NU\n";
    }
    is.close();
    os.close();
    return 0;
}
bool Read()
{
    is >> n >> m >> s;
    for ( int i = 1; i <= n; ++i )
    {
        G[i].clear();
        is >> d[i];
        if ( i == s && d[i] != 0 )
            return false;
    }
    for ( int i = 0, x, y, c; i < m; ++i )
    {
        is >> x >> y >> c;
        if ( d[x] + c < d[y] || d[y] + c < d[x] )
            return false;
        G[x].push_back({y, c});
        G[y].push_back({x, c});
    }
    return true;
}