using System;

using System.Collections.Generic;

using System.Text;

using System.Linq;

​

public class Program

{

    /*

        There is a string "sdfgabcwetrrytruyrtuabcpotre!@#abcprtort" - see above.

        The task is to implement the following method:

​

        public Dictionary<string,string> processString(String inputStr, String separator);

​

        The result need to contain the following keys:

        Count : count all substrings (itemstrings)  infront of which there is a separator string (if xxx is the string and A is the separator here: xxxAxxxAxxxAxxx, you need to return 3);

        prefix : if any string exists before the first separator, please provide the text

        sortedItems : a string with all itemstrings concatinated in alphabetical order

        evenChars : a string with concatinated all even indexed chars (2,4,6,8,10th)

        note: if there is no separator found in input string then whole inputString is counted as 1 itemString 

        Example output when executed with inputString = "abcdefSEPgabcwetSEPsdsSEPdsfgSEPfro",separator = "SEP"));

        Count: 4

        Prefix: abcdef

        sortedItems: dsfg fro gabcwet sds

        evenChars: aceSPaceSPdSPsgEfo

        */

    public static void Main()

    {

        string inputString = "sdfgabcwetrrytruyrtuabcpotre!@#abcprtort";

        var resultList = new List< Dictionary<string,string>>();

        resultList.Add(Program.processString(inputString,"abc"));

        resultList.Add(Program.processString(inputString,"s"));

        resultList.Add(Program.processString(inputString,"r"));

        resultList.Add(Program.processString(inputString,"zi"));

                /*

        implement all results display here in following format:

        Count: some number

        Prefix: some string

        sortedItems: some string

        evenChars: some string

        */

         foreach (Dictionary<string, string> result in resultList)

            {

                System.Console.WriteLine("Count: "+ result["Count"]);

                System.Console.WriteLine("Prefix: "+ result["Prefix"]);

                System.Console.WriteLine("sortedItems: "+ result["sortedItems"]);

                System.Console.WriteLine("evenChars: "+ result["evenChars"]);

                System.Console.WriteLine("");

            }       

​

​

    }

    public static Dictionary<string,string> processString(String inputStr, String separator){     

        Dictionary<string, string> result = new Dictionary<string, string>();   

          var subString = inputStr.Split(separator).ToList();

            for (int i = subString.Count()-1; i >=  0 ; i--)

            {

                if(string.IsNullOrEmpty(subString[i])){

                    subString.Remove(subString[i]);

                }

            }

            result["Count"] = "" + (subString.Count - (inputStr.IndexOf(separator) >= 1?1:0)) + "";

            result["Prefix"] = "";

            result["sortedItems"] = "";

            var chArray = inputStr.ToCharArray(0, inputStr.Length);

            StringBuilder evenCharsItems = new StringBuilder();

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

            {

                if (i % 2 == 0)

                {

                    evenCharsItems.Append(inputStr[i]);

                }

            }

            result.Add("evenChars", evenCharsItems.ToString());

​

            if (inputStr.IndexOf(separator) >= 1)

            {

                result["Prefix"] = subString[0];

                subString.Remove(subString[0]);

​

            }

            var subItem = subString.ToArray();

            Array.Sort(subItem);

            result["sortedItems"] = String.Join(" ", subString);

        return result;

    }

}

​

​

​