06. Replace Repeating Chars

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

namespace ReplaceRepeatingChars
{

    class Program
    {
        static void Main()
        {
            string str = Console.ReadLine();
            var result = new StringBuilder();
            result.Append(str[0]);

            for (int i = 1; i < str.Length; i++)
            {
                if (str[i] != result[^1])
                {
                    result.Append(str[i]);
                }
            }

            Console.WriteLine(result);
        }
    }
}