#include <bits/stdc++.h>
#define INF 1000000000
using namespace std;
ifstream f("distante.in"); ofstream g("distante.out");
vector <pair<int,int> >L[50010];
set <pair<long long,int> >s;
int D[100010],verifD[50010],dc[50010];
int main()
{   int T;
    f>>T;
    for(int n,m,st;T;T--)
    {   f>>n>>m>>st;
        for(int i=1;i<=n;i++) f>>verifD[i];
        for(int x,y,c,i=1;i<=m;i++)
        {   f>>x>>y>>c;
            L[x].push_back(make_pair(y,c));
            L[y].push_back(make_pair(x,c));
        }
        for(int i=1;i<=n;i++) D[i]=INF;
        D[st]=0;
        s.insert(make_pair(0,st));
        while(!s.empty())
        {   int k=s.begin()->second;
            s.erase(s.begin());
            for(unsigned i=0;i<L[k].size();i++){
                if(D[L[k][i].first]>D[k]+L[k][i].second)
                {   s.erase ( make_pair(D[L[k][i].first],L[k][i].first));
                    D[L[k][i].first]=D[k]+L[k][i].second;
                    s.insert (make_pair(D[L[k][i].first],L[k][i].first));
                }
            }
        }
        int ok=1;
        for(int i=1;i<=n;i++)
        {   if(D[i]!=verifD[i]) ok=0;
            L[i].clear();
        }
        if (ok==0) g<<"NU\n"; else g<<"DA\n";
    }
    g.close(); f.close(); return 0;
}