Dãy ngoặc

#include<iostream>
using namespace std;
int n, Count, A[21], B[3];
void Try(int i)
{
    for (int j = 1; j < 3; j++)
    {
        A[i] = j; B[j]++; Count++;
        if ((A[i] == 1 && B[1] <= n)|| (A[i] == 2 && B[2] <= B[1]))
        {
            Try(i + 1);
        }
        if (Count == n * 2&&(B[1]==B[2]))
        {
            for (int index = 0; index < 2 * n; index++)
            {
                if (A[index] == 1) cout << "(";
                else cout << ")";
            }
            cout << endl;
        }
        Count--; B[j]--;
    }
}
int main()
{
    cin >> n;
    B[2] = 0;
    Count = A[0] = B[1] = 1;
    Try(1);
    return 0;
}