#include <iostream>
#include <fstream>

using namespace std;

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


int T, N, M, S, cost[50010];

int main()
{
    int x, y, c, i, j, ok;
    in >> T;
    for(i = 1; i <= T; i++){
        in >> N >> M >> S;
        for(j = 1 ; j <= N; j++){
            in >> cost[j];
        }
        ok = 1;
        for(j = 1;  j <= M; j++){
            in >> x >> y >> c;
            if(cost[x] + c < cost[y]){
                ok = 0;
            }
            if(cost[y] + c < cost[x]){
                ok = 0;
            }
        }
        if(cost[S]){
            ok = 0;
        }
        if(ok == 0){
            out << "NU\n";
        }else{
            out << "DA\n";
        }
    }
    return 0;
}