public static String isBalanced(String s) {
        Map<Character, Character> bMap = Map.of(')','(','}','{',']','[');
        Stack<Character> myStack = new Stack<>();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (bMap.containsValue(c)) myStack.push(c);
            else if (bMap.containsKey(c)) {
                if (!myStack.isEmpty() && bMap.get(c).equals(myStack.peek())) 
                    myStack.pop();
                else return "NO";
            }
        }
        return myStack.isEmpty() ? "YES" : "NO";
    }