С++ ПРОШУ Помогите

 #include <iostream> 
#include <vector> 
#include <string> 
using namespace std; 
 
void generateSequences(string current, int openRound, int closeRound, int openSquare, int closeSquare, vector<string> &result) { 
    if (openRound == 0 && closeRound == 0 && openSquare == 0 && closeSquare == 0) { 
        result.push_back(current); 
        return; 
    } 

    if (openRound > 0) 
        generateSequences(current + '(', openRound - 1, closeRound, openSquare, closeSquare, result); 
      
    if (closeRound > openRound) 
        generateSequences(current + ')', openRound, closeRound - 1, openSquare, closeSquare, result); 
 
    if (openSquare > 0) 
        generateSequences(current + '[', openRound, closeRound, openSquare - 1, closeSquare, result); 
 
    if (closeSquare > openSquare) 
        generateSequences(current + ']', openRound, closeRound, openSquare, closeSquare - 1, result); 
} 
 
vector<string> generateValidSequences(int n) { 
    vector<string> result; 
    if (n % 2 != 0) { 
        return result;
    } 
    generateSequences("", n / 2, n / 2, n / 2, n / 2, result); 
    return result; 
} 
 
int main() { 
    int n; 
    cin >> n; 
 
    vector<string> validSequences = generateValidSequences(n); 
    for (const string &seq : validSequences) { 
        cout << seq << endl; 
    } 
 
    return 0; 
}