#include <bits/stdc++.h>
#define nmx 50005
#define inf 2000000000
using namespace std;
int n,m,s,rs[nmx],mind[nmx];

vector <pair<int,int>> v[nmx];
void dijk(int source)
{
    for (int i=1; i<=n; i++)
        mind[i]=inf;
    priority_queue <pair<int,int>> pq;
    mind[source]=0;
    pq.push({0,source});
    while (!pq.empty())
    {
        auto u=pq.top();
        pq.pop();
        if (-u.first>mind[u.second])
            continue;
        for (auto it : v[u.second])
        {
            if (mind[u.second]+it.first<mind[it.second])
            {
                mind[it.second]=mind[u.second]+it.first;
                pq.push({-mind[it.second],it.second});
            }
        }
    }
}
int t,a,b,c;
int main()
{
    ifstream f ("distante.in");
    ofstream g ("distante.out");
    f>>t;
    while (t--)
    {
        f>>n>>m>>s;
        for (int i=1; i<=n; i++)
            v[i].clear();
        for (int i=1; i<=n; i++)
            f>>rs[i];
        for (int i=1; i<=m; i++)
        {
            f>>a>>b>>c;
            v[a].push_back({c,b});
            v[b].push_back({c,a});
        }
        dijk(s);
        int ok=1;
        for (int i=1; i<=n; i++)
            if (mind[i]!=rs[i]) ok=0;
        if (ok) g<<"DA"<<'\n';
        else g<<"NU"<<'\n';
    }
}