#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream in("distante.in");
ofstream out("distante.out");

struct nod{int frate, cost; nod(int frate, int cost) {this->frate=frate; this->cost=cost;}};
queue <int> q;
int t, n, m, s, d[50001], v[50001];
bool ok;

int main()
{
    int i, j, x, y, z;
    in>>t;
    for(i=1;i<=t;i++)
    {
        vector <nod> a[50001];
        in>>n>>m>>s;
        for(j=1;j<=n;j++)
        {
            in>>v[j];
            d[j]=50000000;
        }
        for(j=1;j<=m;j++)
        {
            in>>x>>y>>z;
            a[x].push_back(nod(y, z));
            a[y].push_back(nod(x, z));
        }
        q.push(s);
        d[s]=0;
        unsigned int i;
        int y;
        while(!q.empty())
        {
            s=q.front();
            q.pop();
            for(i=0;i<a[s].size();i++)
            {
                y=a[s][i].frate;
                if(d[s]+a[s][i].cost<d[y])
                {
                    d[y]=d[s]+a[s][i].cost;
                    q.push(y);
                }
            }
        }
        j=1;
        ok=true;
        while(ok && j<=n)
        {
            if(v[j]!=d[j]) ok=false;
            j++;
        }
        if(ok) out<<"DA"<<"\n";
        else out<<"NU"<<"\n";
    }
    return 0;
}