Kortit

#include <bits/stdc++.h>
using namespace std;

void tapaus(){
    int n;
    cin >> n;
    set<int> s, v;
    int r[111]={};
    for (int i=1; i<=n/2; ++i){
        int a;
        cin >> a;
        s.insert(a);
        r[a]=1;
    }
    for (int i=1; i<=n; ++i){
        if (r[i]==0) v.insert(i);
    }
    int ans=0;
    for (int i=1; i<=n/2; ++i){
        auto it=v.end();
        it--;
        auto ir=s.end();
        ir--;
        if (*ir>*it){
            ans++;
            s.erase(*ir);
        }
        else{
            ir=s.begin();
            s.erase(*ir);
        }
        v.erase(*it);
    }
    cout << ans << "\n";
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) tapaus();
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED