#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    int arr[n];
    for (int i = 0; i < n; i++) cin >> arr[i];
    for (int i = 0; i < n; i++) {
      if ((i + 1) % 2 == 1) {
        if (arr[i] > 0) arr[i] *= -1;
      } else {
        if (arr[i] < 0) {
          arr[i] *= -1;
        }
      }
    }
    for (int i = 0; i < n; i++) {
      cout << arr[i] << " ";
    }
    cout << "\n";
  }
}
