#include <cstdio>
using namespace std;

const int MAXN = 25;
int a[MAXN];

int main()
{
    int T; scanf("%d", &T);
    while (T--)
    {
        int n; scanf("%d", &n);
        for (int i = 1; i <= n; i++)
            scanf("%d", &a[i]);
        int cnt = 0, p = n;
        for (int i = n; i > 0; i--)
        {
            if (a[i] == p)
            {
                p--;
                cnt++;
            }
        }
        printf("%d\n", n - cnt);
    }
    return 0;
}