int BS = int.Parse(Console.ReadLine());
            int chislo = int.Parse(Console.ReadLine());
            string[]stack = new string[100];
            string stack1="";
            int ind = 0;
            while(chislo>=BS)
            {
                int promenliva = chislo % BS;
                stack[ind] = promenliva.ToString(); //String.Copy(Convert.ToString(promenliva, 5));
                ind++;
                chislo = chislo / BS;
            }
            stack[ind] = chislo.ToString();
            for (int i = ind; i >= 0; i--) stack1 = stack1 + stack[i];
                Console.Write(stack1);