#include <bits/stdc++.h>
#pragma warning(disable : 4996)
using namespace std;
const long double pi = acos(-1.0);
const long double eps = 1e-5;
const int INF = 0x3f3f3f3f;
const long long INFLL = 0x3f3f3f3f3f3f3f3f;
int a[300010];
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int T;
  cin >> T;
  while (T--) {
    int n;
    cin >> n;
    map<int, int> l;
    map<int, int> r;
    for (int i = (1); i <= (n); i++) {
      cin >> a[i];
      if (!l[a[i]]) l[a[i]] = i;
      r[a[i]] = i;
    }
    int ans = l.size();
    int p = 0;
    int cnt = 0;
    int res = 0;
    for (auto it : l) {
      if (p < it.second)
        cnt++;
      else
        cnt = 1;
      p = r[it.first];
      res = max(res, cnt);
    }
    cout << ans - res << '\n';
  }
  return 0;
}
