#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("distante.in");
ofstream g("distante.out");
int t,d[50005],n,m,s;
vector < pair<int,int> > a[50005];
string check()
{
    int i,j;
    bool sw;
    for(i=1;i<=n;i++)
    {
        if(i==s)
        {
            sw=1;
        }
        else
        {
            sw=0;
        }
        for(j=0;j<a[i].size();j++)
        {
            if(d[a[i][j].first]>d[i]+a[i][j].second)
            {
                return "NU\n";
            }
            if(i!=s)
            {
                if(d[i]==d[a[i][j].first]+a[i][j].second)
                {
                    sw=1;
                }
            }
        }
        if(sw==0)
        {
            return "NU\n";
        }
    }
    return "DA\n";
}
int main()
{
    int i,j,x,y,cost;
    f>>t;
    while(t--)
    {
        f>>n>>m>>s;
        for(i=1;i<=n;i++)
        {
            f>>d[i];
        }
        while(m--)
        {
            f>>x>>y>>cost;
            a[x].push_back({y,cost});
            a[y].push_back({x,cost});
        }
        g<<check();
        for(i=1;i<=n;i++)
        {
            a[i].clear();
        }
    }
    return 0;
}