//#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream cin("distante.in");
ofstream cout("distante.out");
int dist[50005],d[50005];
vector <pair<int,int> > v[50005];
void redo(int n){
    for(int i=1;i<=n;i++){
        v[i].clear();
    }
}
int main()
{
    int  t,n,m,s,a,b,c;
    cin>>t;
    while(t--){
        cin>>n>>m>>s;
        for(int i=1;i<=n;i++){
            cin>>dist[i];
        }
        for(int i=1;i<=m;i++){
            cin>>a>>b>>c;
            v[a].push_back(make_pair(b,c));
            v[b].push_back(make_pair(a,c));
        }
        int ok=0;
        for(int i=1;i<=n;i++){
            d[i]=50000005;
        }
        if(dist[s]!=0){
            ok=1;
        }
        d[s]=0;
        for(int i=1;i<=n;i++){
            for(auto u:v[i]){
                if(u.first!=s)
                    d[u.first]=min(d[u.first],dist[i]+u.second);
            }
        }
        for(int i=1;i<=n;i++){
            if(d[i]!=dist[i]){
                ok=1;
            }
        }
        if(ok==1){
            cout<<"NU\n";
        }
        else
            cout<<"DA\n";
        redo(n);
    }
    return 0;
}