#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    int a[n];
    for (int i = 0; i < n; i++) cin >> a[i];
    int i = n - 1;
    while (i >= 1 && a[i - 1] >= a[i]) i--;
    while (i >= 1 && a[i - 1] <= a[i]) i--;
    cout << i << endl;
  }
  return 0;
}
