#include <fstream>
#include <vector>
#include <queue>
using namespace std;

#define NMax 50005

ifstream f("distante.in");
ofstream g("distante.out");

int T;
int n,m,s,i;
int D[NMax],viz[NMax];
int a,b,c;

int solve()
{
    vector<int> v[NMax],w[NMax];
    queue<int> cd;

    f>>n>>m>>s;
    for(i=1;i<=n;++i)
    {
        f>>D[i];
        viz[i]=0;
    }
    for(i=1;i<=m;++i)
    {
        f>>a>>b>>c;
        v[a].push_back(b);
        w[a].push_back(c);
        v[b].push_back(a);
        w[b].push_back(c);
    }

    if(D[s]!=0) return 0;
    viz[s]=1;
    cd.push(s);

    while(!cd.empty())
    {
        s=cd.front();
        cd.pop();

        for(i=0;i<v[s].size();++i) if(viz[v[s][i]]==0)
        {
            if(D[s]+w[s][i]<D[v[s][i]]) return 0;
            if(D[s]+w[s][i]==D[v[s][i]])
            {
                viz[v[s][i]]=1;
                cd.push(v[s][i]);
            }
        }
    }

    for(i=1;i<=n;++i) if(viz[i]==0) return 0;

    return 1;
}

int main()
{
    f>>T;
    while(T--) if ( solve() == 1) g<<"DA\n"; else g<<"NU\n";

    f.close();
    g.close();
    return 0;
}