#include <fstream>
#include <vector>
#include <queue>

using namespace std;

ifstream cin("distante.in");
ofstream cout("distante.out");

priority_queue<pair <int,int>,vector <pair < int,int>>,greater<pair < int,int>>> q;
int t,n,m,x,y,z,d[50005],ok,d2[50005],nodulet;
vector<pair <int ,int>> v[250005];

int main()
{
    cin>>t;
    while(t--){
        cin>>n>>m>>nodulet;
        for(int i=1;i<=n;i++){
            d[i]=(1<<20);
        }
        for(int i=1;i<=n;i++){
            cin>>d2[i];
        }
        for(int i=1;i<=m;i++){
            cin>>x>>y>>z;
            v[x].push_back({y,z});
            v[y].push_back({x,z});
        }
        d[nodulet]=0;
        q.push({0,nodulet});
        while(!q.empty()){
            int nod=q.top().second;
            int idk=q.top().first;
            q.pop();
            if(d[nod]!=idk){
                continue;
            }
            for(auto x: v[nod]){
                if(d[x.first]>d[nod]+x.second){
                    d[x.first]=d[nod]+x.second;
                    q.push({d[x.first],x.first});
                }
            }
        }
        for(int i=2;i<=n;i++){
            if(d[i]==(1<<20) && d2[i]!=0 || (d[i]==0 && d2[i]!=0)){
                ok=1;
            }
            else{
                if(d[i]!=d2[i]){
                    ok=1;
                }
            }
        }
        if(ok==1){
            cout<<"NU"<<'\n';
        }
        else
            cout<<"DA"<<'\n';
        ok=0;
    }
    return 0;
}