#include <bits/stdc++.h>
using namespace std;
int a[55];
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    int sum = 0;
    for (int i = 0; i < n; i++) {
      cin >> a[i];
      sum += a[i];
    }
    sort(a, a + n);
    if (sum == 0)
      cout << "NO" << endl;
    else {
      cout << "YES" << endl;
      if (sum < 0) {
        for (int i = 0; i < n; i++) {
          cout << a[i] << " ";
        }
      } else {
        for (int i = n - 1; i >= 0; i--) {
          cout << a[i] << " ";
        }
      }
      cout << endl;
    }
  }
  return 0;
}
