#include <iostream>

using namespace std;

int main() {
    string st = "[dw wd[ ww w]aa dwa dsf fre dz fd]";
    bool b = true;
    int x1 = 0;
    int x2 = 0;
    for (int i = 0; i < st.length(); ++i) {
        if (st[i] == '[') {
            x1++;
            cout << endl << "[ :" << i;
            if (x1 <= x2) {
                b = false;
            }
        } else if (st[i] == ']') {
            x2++;
            cout << endl << "] :" << i;
        }
    }
    if (x1 + x2 == 0) {
        cout << endl << "ERROR";
    } else if (b && x1==x2) {
        cout << endl << "there is a balance of parentheses";
    } else{
        cout << endl << "no balance brackets";
    }
}