#include <vector>
#include <iostream>
#include <limits>
using namespace std;

vector<int> minSuf(vector<int> a) {

    vector<int> ans;
    reverse(a.begin(), a.end());

    for (int i = 0; i < a.size(); i++) {
        if (!i) {
            ans.push_back(a[i]);
        } else {
            ans.push_back(min(a[i], ans[i - 1]));
        }
    }

    reverse(ans.begin(), ans.end());

    return ans;
}

// 1 2 0 3 4
// 1 1

int main() {
    int t;
    cin >> t;

    while(t--) {
        int n;
        cin >> n;
        vector<int> a(n);
        for (int i = 0; i < n; i++)
            cin >> a[i];

        vector<int> suf = minSuf(a);

        int ans = 0;
        for (int i = 0; i < n - 1; i++) {
            if (a[i] > suf[i + 1])
                ans++;
        }

        cout << ans << endl;
    }
}