MOJAB 24

#include <iostream>
#include <stack>
#include <string>

bool isValidParentheses(std::string s) {
    std::stack<char> st;
    
    for (char c : s) {
        if (c == '(' || c == '[' || c == '{') {
            st.push(c);
        } else {
            if (st.empty()) {
                return false;
            }
            char top = st.top();
            if ((c == ')' && top == '(') || (c == ']' && top == '[') || (c == '}' && top == '{')) {
                st.pop();
            } else {
                return false;
            }
        }
    }
    
    return st.empty();
}

int main() {
    std::string s;
    std::cout << "Enter a string of parentheses: ";
    std::cin >> s;
    
    if (isValidParentheses(s)) {
        std::cout << "YES" << std::endl;
    } else {
        std::cout << "NO" << std::endl;
    }
    
    return 0;
}