#include <iostream>
#include <fstream>

using namespace std;
ifstream f("distante.in");
ofstream g("distante.out");

int n, m, t, s, D[50000], sol;

int main()
{
    f>>t;
    while(t--)
    {
        sol = 1;
        f>>n>>m>>s;
        for(int i = 1; i <= n; i++) f>>D[i];
        if(D[s]!=0) sol = 0;
        while(m--)
        {
            int x, y, c;
            f>>x>>y>>c;
            if(D[x] + c < D[y]) sol = 0;
        }
        if(sol == 0) g<<"NU\n";
        else g<<"DA\n";
    }
    return 0;
}