#include <bits/stdc++.h>

using namespace std;

const int NMAX(50005);
int d[NMAX], dist[NMAX];
bool viz[NMAX];
vector<pair<int, int> > G[NMAX];

int main()
{
    freopen("distante.in", "r", stdin);
    freopen("distante.out", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    int t;
    cin >> t;
    while(t--)
    {
        int n, m, st;
        cin >> n >> m >> st;
        for(int i = 1; i <= n; ++i)
        {
            cin >> d[i];
            G[i].clear();
            dist[i] = (1 << 30);
            viz[i] = 0;
        }
        for(int i = 1; i <= m; ++i)
        {
            int a, b, c;
            cin >> a >> b >> c;
            G[a].push_back({b, c});
            G[b].push_back({a, c});
        }
        set<pair<int, int> > s;
        s.insert({0, st});
        dist[st] = 0;
        while(!s.empty())
        {
            int nod = s.begin()->second;
            s.erase(s.begin());
            viz[nod] = 1;
            for(auto it: G[nod])
                if(!viz[it.first])
                {
                    int newC = dist[nod] + it.second;
                    if(newC < dist[it.first])
                    {
                        if(dist[it.first] != (1 << 30))
                            s.erase(s.find({dist[it.first], it.first}));
                        dist[it.first] = newC;
                        s.insert({newC, it.first});
                    }
                }
        }
        bool ok = 1;
        for(int i = 1; i <= n; ++i)
            if(d[i] != dist[i])
            {
                ok = 0;
                break;
            }
        cout << (ok == 1? "DA\n" : "NU\n");
    }
    return 0;
}