Untitled

#include <bits/stdc++.h>

using namespace std;

int main() {
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
//	freopen("output.txt", "w", stdout);
#endif
	
	int t;
	cin >> t;
	while (t--) {
		int n;
		cin >> n;
		vector<int> a(n);
		for (auto &it : a) cin >> it;
		int pos = n - 1;
		while (pos > 0 && a[pos - 1] >= a[pos]) --pos;
		while (pos > 0 && a[pos - 1] <= a[pos]) --pos;
		cout << pos << endl;
	}
	
	return 0;
}