#include <bits/stdc++.h>
using namespace std;
template <class T>
bool uin(T &a, T b) {
  return a > b ? (a = b, true) : false;
}
template <class T>
bool uax(T &a, T b) {
  return a < b ? (a = b, true) : false;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cout.precision(10);
  cout << fixed;
  int q;
  cin >> q;
  while (q--) {
    int n;
    cin >> n;
    vector<vector<int> > occs(n);
    for (int i = 0; i < (int)(n); ++i) {
      int x;
      cin >> x;
      --x;
      occs[x].push_back(i);
    }
    int dif = 0;
    for (int i = 0; i < (int)(n); ++i)
      if (!occs[i].empty()) ++dif;
    int ch = 0, maxch = 0, R = -1;
    for (int i = 0; i < (int)(n); ++i) {
      if (occs[i].empty()) continue;
      if (occs[i][0] > R)
        ++ch, uax(maxch, ch);
      else
        ch = 1;
      R = occs[i].back();
    }
    cout << dif - maxch << '\n';
  }
  return 0;
}
