#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; ++i) cin >> a[i];
    int m = a[n - 1], ans = 0;
    for (int i = n - 1; i >= 0; --i) {
      if (a[i] > m) ++ans;
      m = min(m, a[i]);
    }
    cout << ans << "\n";
  }
  return 0;
}
