Kortit

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

void solve(int n, vector<int> v) {
    sort(v.begin(), v.end());
    int ans = 0;
    int prev = 0;
    for (int i = 0; i < n/2; i++) {
        ans += v[i] - prev - 1;
        prev = v[i];
    }
    cout << ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(0); 
    cin.tie(0);
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        int n; cin >> n;
        vector<int>v;
        v.resize(n/2);
        for (int j = 0; j < n/2; j++) cin >> v[j];
        solve(n,v);
    }
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER