using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai9
{

    class DaThuc
    {
        public Stack<int> heso = new Stack<int>();
        public Stack<int> somu = new Stack<int>();
        void Input(string name)
        {
            string temp = "";
            string temp2 = "";
            for (int i = 0; i < name.Length; i++)
            {
                if (name[i] == '^')
                {
                    i++;
                    while (name[i] != '-' && name[i] != '+')
                    {
                        temp2 = temp2 + name[i];
                        i++;
                    }
                    int a;
                    Convert.ToInt32(temp2);
                    Console.WriteLine(temp2);
                    temp2 = "";
                }
                else if (name[i] != '*' && name[i] != 'x' && name[i] != '^')

                {
                    temp = temp + name[i];

                }
                else if (name[i] == 'x')
                {
                    int j = i;
                    while (j > 0 && (name[j] != '-' && name[j] != '+'))
                        j--;
                    int a;
                    if (name[j] == '-')
                    {
                        a = Convert.ToInt32(temp);
                        a = -a;
                    }

                    else
                        a = Convert.ToInt32(temp);
                    heso.Push(a);
                    Console.WriteLine(a);
                    temp = "";

                }
            }
            heso.Push(Convert.ToInt32(temp));
            Console.WriteLine(temp);
        }
    }
    class Program
    {

        static void Main(string[] args)
        {
            Stack<int> heso = new Stack<int>();
            Stack<int> somu = new Stack<int>();
            string name = "231*x^4-23*x^3+3*x^2+2*x^1-3";
            string temp = "";
            string temp2 = "";
            for (int i=0; i < name.Length;i++)
            {
                if (name[i] == '^')
                {
                    i++;

                    while (name[i] != '-' && name[i] != '+')
                    {
                        temp2 = temp2 + name[i];
                        i++;
                    }
                    Convert.ToInt32(temp2);
                    Console.WriteLine(temp2);
                    temp2 = "";
                }
                else if (name[i] != '*' && name[i] != 'x' && name[i] != '^')
                {
                    temp = temp + name[i];

                }
                else if (name[i] == 'x')
                {
                    int j = i;
                    while (j > 0 && (name[j] != '-' && name[j] != '+'))
                        j--;
                    int a;
                    if (name[j] == '-')
                    {
                        a = Convert.ToInt32(temp);
                        a = -a;
                    }
                    else
                        a = Convert.ToInt32(temp);
                    heso.Push(a);
                    Console.WriteLine(a);
                    temp = "";

                }
                else if(name[i]=='-'|| name[i]=='+')
                {
                    if (name[i - 1] == 'x')
                        heso.Push(1);
                    Console.WriteLine(1);
                }
            }
            heso.Push(Convert.ToInt32(temp));
            Console.WriteLine(temp);
        }
    }
}