#include<fstream>
#include<queue>
#include<vector>
#define maxn 100001
#define INF 0x3f3f3f3f
using namespace std;
ifstream f("distante.in");
ofstream g("distante.out");
queue <long> q;
vector <long> G[maxn], C[maxn];
long i,n,m,x,y,c,d[maxn],cor[50001],t,s,ver1;
int main()
{
    f>>ver1;
    for(int ver=1;ver<=ver1;ver++)
    {
    f>>n>>m>>s;
    for(int k=1;k<=n;k++)
    {
        f>>cor[k];
    }
    t=m;
    while(t--)
    {
        f>>x>>y>>c;
        G[x].push_back(y);
        C[x].push_back(c);
    }
    for(i=1;i<=n;i++)
    {
        if(i!=s)
        d[i]=INF;
    }
        d[s]=0;
    q.push(s);
    while(!q.empty())
    {
        x=q.front();
        for(i=0;i<G[x].size();i++)
            if(d[G[x][i]]>d[x]+C[x][i])
        {

            d[G[x][i]]=d[x]+C[x][i];
            q.push(G[x][i]);

        }
        q.pop();
    }
   int ok=1;
    for(i=1;i<=n;i++)
    {
        if(cor[i]!=d[i])
        {
            ok=0;
            break;
        }
    }
    if(!ok)
        g<<"NU"<<'\n';
        else
        g<<"DA"<<'\n';
    }
    return 0;
}