Kortit

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define ld long double

using namespace std;

int k[111], n, t;

int main() {
	cin.tie(0);
	cout.tie(0);
	ios_base::sync_with_stdio(0);
	cin >> t;
	for(int g=0; g<t; g++) {
		cin >> n;
		for(int i=1; i<=n; i++)
			k[i] = 0;
		int f;
		for(int i=0; i<n/2; i++) {
			cin >> f;
			k[f] = 1;
		}
		int m = 1;
		int v = n;
		int ans = 0;
		for(int i=0; i<n/2; i++) {
			while(k[v])
				v--;
			while(!k[m])
				m++;
			if(m>v)
				ans++;

			v--;
			m++;
		}
		cout << ans << "\n";
	}
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER