static String getSubSet(int[] a, int low, int high) {
if (low > high) {
return "No";
}
if (a[low] + a[high] == 0) {
return "Yes";
} else if (a[low] + a[high] > 0) {
return getSubSet(a, low, high-1);
} else {
return getSubSet(a, low+1, high);
}
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int T = sc.nextInt();
while (T-- > 0) {
int S = sc.nextInt();
int[] a = new int[S];
for (int i = 0; i < a.length; i++) {
a[i] = sc.nextInt();
}
Arrays.sort(a);
String res = getSubSet(a, 0, a.length - 1);
System.out.println(res);
}
}
