/**

​

Maximum Occurrence

​

Given a string text. 

Write a function that returns the character with the highest frequency. 

If more than 1 character has the same highest frequency, return all those characters as a comma separated string.

If there is no repetition in characters, return "No Repetition".

​

Example

​

MaxOccur("Computer Science") ➞ "e"

​

MaxOccur("Edabit") ➞ "No Repetition"

​

MaxOccur("system admin") ➞ "m, s"

​

MaxOccur("the quick brown fox jumps over the lazy dog") ➞ " "

​

**/

using System;

​

public class Program

{

    static string FindMaxOccuranceCharacter(string s) {

        int [] charCount = new int[256];

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

            charCount[s[i]]++;

        }

        int MaxFrequency = 0;

        string MaxFrequencyCharacterString = "";

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

            if(charCount[s[i]]>MaxFrequency){

                MaxFrequency = charCount[s[i]];

                 MaxFrequencyCharacterString = s[i].ToString();

            }

        }

        if(MaxFrequency == 1){

            return "No Repetition" ;

        }else {

            return  MaxFrequencyCharacterString;

        }

    }

    public static void Main(string[] args)

    {

        Console.WriteLine("Enter String");

        string str = Console.ReadLine();

        Console.WriteLine(FindMaxOccuranceCharacter(str));

    }

}