#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int t;
  cin >> t;
  while (t--) {
    long long int n, s = 0;
    cin >> n;
    long long int* arr = new long long int[n];
    for (long long int i = 0; i < n; i++) {
      cin >> arr[i];
      s += arr[i];
    }
    if (s == 0)
      cout << "NO"
           << "\n";
    else if (s > 0) {
      cout << "YES"
           << "\n";
      sort(arr, arr + n, greater<long long int>());
      for (long long int i = 0; i < n; i++) cout << arr[i] << " ";
      cout << "\n";
    } else {
      cout << "YES"
           << "\n";
      sort(arr, arr + n);
      for (long long int i = 0; i < n; i++) cout << arr[i] << " ";
      cout << "\n";
    }
  }
  return 0;
}
