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

using namespace std;

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


#define NMAX 50005
#define INF 2e9

int N,M,S,T;
int a[NMAX],dist[NMAX];

priority_queue <pair <int, int > > Q;
vector < pair < int, int > > G[NMAX];

void init()
{
    int i,j;
    for(i=1; i<=N; i++)
        dist[i]=INF;
}




bool BFS()
{
    int i;
    int curr_node;
    dist[S]=0;
    Q.push({0,S});
    while(Q.empty()==false)
    {
        curr_node = Q.top().second;
        Q.pop();
        for(auto it: G[curr_node])
        {
            int neigh = it.first;
            int cost = it.second;
            if(dist[curr_node]+cost<dist[neigh])
            {
                dist[neigh]=dist[curr_node]+cost;
                Q.push({-dist[neigh],neigh});
            }
        }
    }
    /*for(i=1;i<=N;i++)
        cout<<dist[i]<<" ";
    cout<<endl;*/
    for(i=1; i<=N; i++)
        if(dist[i]!=a[i]) return false;
    return true;
}


int main()
{
    int i,j,t,x,y,c;
    cin>>T;
    for(t=1; t<=T; t++)
    {
        cin>>N>>M>>S;
        for(i=1; i<=N; i++)
            cin>>a[i];
        for(i=1; i<=M; i++)
        {
            cin>>x>>y>>c;
            G[x].push_back({y,c});
            G[y].push_back({x,c});
        }
        init();
        if(BFS() == true) cout<<"DA";
        else cout<<"NU";
        cout<<'\n';
    }

    return 0;
}