#include<cstdio>
#include<vector>
using namespace std;
#define inf 1<<30
struct muchie {int x,y,c;} G[50005];
int t,m,n,s,d[50005];
void rez()
{
    int x,y,c,i;
    bool ok;
    scanf("%d%d%d",&n,&m,&s);
    for (i=1;i<=n;++i) scanf("%d",&d[i]);
    d[s]=0;
    for (i=1;i<=m;++i)
    {
        scanf("%d%d%d",&x,&y,&c);
        G[i].x=x, G[i].y=y, G[i].c=c;
    }
    for (i=1,ok=true;i<=m && ok;++i)
        if (d[G[i].x]+G[i].c<d[G[i].y])
            ok=false;
    if (ok) printf("DA\n");
    else printf("NU\n");
}
int main()
{
    int i;
    freopen("distante.in","r",stdin);
    freopen("distante.out","w",stdout);
    scanf("%d",&t);
    for (i=0;i<t;++i)
        rez();
    return 0;
}