/**

​

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;

using System.Collections.Generic;

public class Program

{

    public static void getMaxOccurance(String str){

        //create a dictionary 

        Dictionary<char, int> dict = new Dictionary<char, int>();

        //initialise maximum 

        int max= 0; 

        List<char> list = new List<char>();

        //run a for loop through the length of the string and store the max value in the dictionary 

        foreach (char c in str)

{

    int i;

    dict.TryGetValue(c, out i);

    i++;

    if (i > max)

    {

        max = i;

    }

    dict[c] = i;

}

​

//if there is a value stored then proceed else print no repition

 if (max == 1){

      Console.WriteLine("No Repitions");

  }

 else{

     foreach (KeyValuePair<char, int> chars in dict){

        if (chars.Value == max) {

   Console.WriteLine("{0}: {1}", chars.Key, chars.Value);

    }

}

}

   }  

    public static void Main()

    {

     Console.WriteLine("Enter the string value: " ); 

     String str = Console.ReadLine();

     getMaxOccurance(str); 

    }

}