Kortit

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
void solve() {
	int n;
	cin >> n;
 
	int res = 0, cur = 0, j = 1;
	for (int h = n/2; h; --h) {
		int i;
		cin >> i;
		while(i > j) {
			++j;
			++cur;
		}
		++j;
 
		if (cur > 0) {
			--cur;
			++res;
		}	
	}
	cout << res << '\n';
}
 
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
 
	int t;
	cin >> t;
	for (int ti = 0; ti < t; ++ti) solve();
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER