#include <fstream>
#include <vector>
#include <queue>
#include <limits>

using namespace std;

ifstream cin("distante.in");
ofstream cout("distante.out");

vector< vector< pair<int,int> > > a;
vector<int> d;
vector<bool> u;
queue<int> q;
int n,m,dd[50001];

bool dijkstra(int x)
{
    int k;
    d[x]=0;
    u[x]=true;
    q.push(x);
    while(!q.empty())
    {
        k=q.front();q.pop();
        u[k]=false;
        for(vector< pair<int,int> >::iterator i=a[k].begin();i!=a[k].end();i++)
            if(d[k]+i->second < d[i->first])
            {
                d[i->first]=d[k]+i->second;
                if(u[i->first]==false)
                {
                    q.push(i->first);
                    u[i->first]=true;
                }

            }
    }
    for(int i=2;i<=n;i++)
    {
        if(d[i]==numeric_limits<int>::max())d[i]=0;
        if(d[i]!=dd[i])return false;
    }
    return true;
}
int main()
{
    int x,y,z,j,t,st;
    for(cin>>t;t;t--)
    {
        cin>>n>>m>>st;
        a=vector< vector< pair<int,int> > >(n+1);
        d=vector<int>(n+1,numeric_limits<int>::max());
        u=vector<bool>(n+1);
        for(j=1;j<=n;j++)cin>>dd[j];
        for(;m;m--)
        {
            cin>>x>>y>>z;
            a[x].push_back(make_pair(y,z));
        }
        if(dijkstra(st))cout<<"DA"<<'\n';
        else cout<<"NU"<<'\n';
    }
    return 0;
}