#include <bits/stdc++.h>
using namespace std;


#define INF 999999999
queue <int> q;
vector <int> G[50001],C[50001];


int d1[50001],d2[50001],x,y,c,m,n,p,L,xi,yi;

void bfs(int xs,int d[])
{
    q.push(xs);
    d[xs]=0;

    while(!q.empty()){
        x = q.front();
        for(int i=0;i<G[x].size();i++){
        //    ap[p][G[x][i]]=1;
            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();
    }
}

bool check()
{
    for(int i=1;i<=n;i++)
        if(d1[i]!=d2[i])
            return 0;
    return 1;
}
int main()
{
    freopen("distante.in","r",stdin);
    freopen("distante.out","w",stdout);
int t;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d%d",&n,&m,&p);
        for(int i=1;i<=n;i++)
            scanf("%d",&d2[i]);
            bool ok=1;
            if(d2[p]!=0) ok=0;
        while(m--){
            scanf("%d %d %d",&x,&y,&c);
            if(d2[x]+c <d2[y]) ok=0;
            if(d2[y]+c <d2[y] ) ok=0;
        }
        if(ok)printf("DA\n");
        else printf("NU\n");

    }


   return 0;
}