class Program
    {
        static void Main(string[] args)
        {
            int x;
            Console.Write("inserire :");
            string op = Console.ReadLine();

            string ris="";

            Stack<string> num = new Stack<string>();

            string[] arr = op.Split(' ');

            for (int i = 0; i < arr.Length; i++)
            {

                switch (arr[i])
                {
                    case "+":case "-":case "*":case "/":case "^":
                        {
                            foreach (var a in num)
                            {
                                if (a == "(")
                                {
                                    int last = ;
                                }

                                /*if (LaCassssaa.controllo(arr[i]) < LaCassssaa.controllo(a))
                                {
                                    foreach (var b in num)
                                    {
                                        if (b == "(")
                                        {
                                            string cestino = num.Pop();
                                            break;
                                        }
                                        else
                                            ris += num.Pop();
                                    }
                                }
                            }*/
                            num.Push(arr[i]);
                            break;
                        }

                    case "(":
                        {
                            num.Push(arr[i]);
                            break;
                        }

                    case ")":
                        {
                            foreach (var b in num)
                            {
                                if (b == "(")
                                    break;
                                else
                                    ris += b;
                            }
                            break;
                        }

                    case "0":
                    case "1":
                    case "2":
                    case "3":
                    case "4":
                    case "5":
                    case "6":
                    case "7":
                    case "8":
                    case "9":
                        {
                            ris += arr[i];
                            break;
                        }




                    default:
                        {
                            break;
                        }

                }

            }

            Console.WriteLine(ris);

        }
    }

static public int controllo(string a)
        {

            switch (a)
            {
                case "+":
                    {
                        return 1;
                    }
                case "-":
                    {
                        return 1;
                    }
                case "*":
                    {
                        return 2;
                    }
                case "/":
                    {
                        return 2;
                    }
                case "^":
                    {
                        return 3;
                    }
            }
            return 0;


        }
    }