백준 2693 c++

오늘 왜 이렇게 머리가 안 돌아가지

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

using namespace std;

int main(void)
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	int N;
	int i, j;
	vector <int> A(10, 0);

	cin >> N;
	for (i = 0; i < N; i++)
	{
		for (j = 0; j < A.size(); j++)
		{
			cin >> A[j];
		}
		sort(A.begin(), A.end());
		cout << A[A.size() - 3] << "\n";
	}

	return 0;
}