Kortit

#include <iostream>
#include <vector>
using namespace std;
int main() {
  int tt;
  cin>>tt;
  for(int xx = 0; xx < tt; ++xx) {
    int is_my_card[101] = {0};
    int n;
    cin>>n;
    for(int i = 0; i < n/2; ++i) {
      int a;
      cin>>a;
      is_my_card[a] = 1;
    }
    std::vector<int> my_cards;
    std::vector<int> opponent_cards;
    for(int i = 1; i <= n; ++i) {
      if(is_my_card[i]) {
        my_cards.push_back(i);
      }
      else {
        opponent_cards.push_back(i);
      }
    }
    size_t opponent_pos = 0;
    int ans = 0;
    for(size_t i = 0; i < my_cards.size(); ++i) {
      if(opponent_pos < opponent_cards.size() 
         && opponent_cards[opponent_pos] < my_cards[i]) {
        ++ans;
        ++opponent_pos;
      }
    }
    cout<<ans<<endl;
  }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED