#include <cstdio>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <iostream>

#define mp make_pair
#define pb push_back
#define xx first
#define yy second
#define mod 1000000007ll
using namespace std;

int a[10005], b[10005];

main() {
    int T, i, n, ma, x, s, j, flag, y, p;
    
    scanf("%d",&T);
    while (T--){
      scanf("%d",&n);
      for (i = 0; i < n; i++){
    scanf("%d",&a[i]);
    a[i] --;
      }

      s = n - 1;
      p = 0;
      for (i = n - 1; i >= 0; i--)
      if (a[i] == s) {p++; s--;}
      
      printf("%d\n", n - p);
    }
    
    return 0;
}