Мой вариант скобок

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
    string a;
    cin >> a;
    vector <char> open;
    open.clear();
    vector <char> close;
    close.clear();
    int circle = 0;
    int figure = 0;
    int square = 0;
    int triangle = 0;
    for (int i = 0 ; i < a.length(); i++)
    {
        switch (a[i]) {
            case '(': {
                circle++;
                open.push_back('(');
                break;
            }
            case ')': {
                circle--;
                close.push_back('(');
                break;
            }
            case '{': {
                figure++;
                open.push_back('{');
                break;
            }
            case '}': {
                figure--;
                close.push_back('{');
                break;
            }
            case '[': {
                square++;
                open.push_back('[');
                break;
            }
            case ']': {
                square--;
                close.push_back('[');
                break;
            }
            case '<': {
                triangle++;
                open.push_back('<');
                break;
            }
            case '>': {
                triangle--;
                close.push_back('<');
                break;
            }
        }
        if (circle < 0 || figure < 0 || square < 0 || triangle < 0)
        {
            cout << "NO";
            return 0;
        }
    }
    std:: reverse(close.begin(), close.end());
    if (open == close)
        cout << "yes";
    else
        cout << "no";
}