#include <fstream>
using namespace std;
int main(){
	bool k;
	int T, N, M, s,c;
	int d[50001];
	int a, b, cost;
	ifstream f("distante.in");
	ofstream of("distante.out");
	f >> T;
	for (int p = 0; p < T; ++p){
		f >> N >> M >> s;
		k = 1;
		for (int i = 1; i <=N; ++i)f >> d[i];
		if (d[s] != 0)k = 0;
		for (int i = 0; i < M; ++i){
			f >> a >> b >> c;
			if (d[a] + c < d[b]) k = 0;
		}
		if (!k) of << "NU" << "\n";
		else of << "DA" << "\n";
	}
}