#include<bits/stdc++.h>using namespace std;int main() {int t;cin >> t;while (t--) {int n, m;cin >> n >> m;vector< int > vc(400), last_order(401), occu(401);for (int i = 0; i < m; i++) {cin >> vc[i];last_order[vc[i]] = i;}//occu[vc[i]] = 0, if customer is not already sitting on some table//occu[vc[i]] = 1, if customer has occupied some tableint free_tables = n, clean = 0;for (int i = 0; i < m; i++) {if (occu[vc[i]] == 0) {if (free_tables) {occu[vc[i]] = 1;free_tables--;clean++;