07. String Explosion

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

namespace StringExplosion
{

    class Program
    {
        static void Main()
        {
            var sb = new StringBuilder(Console.ReadLine());
            int count = 0;

            for (int i = 0; i < sb.Length; i++)
            {
                if (sb[i] == '>')
                {
                    continue;
                }

                if (char.IsDigit(sb[i]))
                {
                    count += sb[i] - 48;
                }

                if (count != 0)
                {
                    sb.Remove(i, 1);
                    count--;
                    i--;
                }
            }

            Console.WriteLine(sb);
        }
    }
}