title: Difference Between Highest And Least Frequencies In An Array
signature: class Solution {
  
      public int DifferenceBetweenHighestAndLeastFrequenciesInAnArray(List<int> arr, int n) {
test_code: using System;
  using System.Numerics;
  using System.Diagnostics;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Security.Cryptography;
  using System.Web.UI;
  using System.Web.Script.Serialization;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  namespace EvaluatePrediction {
      class TestRunner {
          public bool ValidateSolution(int actual, int expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> arr, int n, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(arr, n); 
                if (ValidateSolution(
                      pred_result,
                      expected)){
                  return "PASSED";
                }
                return "FAILED";
              } 
              catch (Exception exception_obj)
              {
                return exception_obj.GetType().FullName;
              }
          }
          static void Main(string[] args) {
              TestRunner runner = new TestRunner();
              String result;
              result = runner.driver(
                  new List<int>{5, 15, 19, 22, 28, 29, 39, 46, 46, 49, 51, 55, 62, 69, 72, 72, 72, 74, 79, 92, 92, 93, 95, 96}, 15, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-92, -92, -78, -74, -70, -66, -60, -54, -50, -48, -34, -32, -26, -24, -22, -14, -10, -10, -6, 2, 4, 6, 12, 18, 34, 42, 52, 56, 76, 92, 92}, 30, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 24, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{1, 5, 13, 17, 21, 22, 25, 26, 29, 29, 31, 32, 35, 38, 40, 46, 48, 48, 49, 53, 54, 59, 61, 65, 65, 66, 73, 79, 81, 83, 92, 92, 93, 96, 97, 98}, 29, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-70, -34, -32, -30, -14, 80, 86, 90}, 4, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 23, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{9}, 0, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{10, 42, 70, 94}, 2, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 24, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{3, 4, 7, 8, 10, 15, 15, 17, 22, 26, 49, 55, 60, 64, 76, 79, 80, 84, 90, 92, 95, 96}, 20, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def difference_between_highest_and_least_frequencies_in_an_array(arr, n):
      arr.sort()
      count = 0
      max_count = 0
      min_count = n
      for i in range(0, (n - 1)):
          if (arr[i] == arr[(i + 1)]):
              count += 1
              continue
          else:
              max_count = max(max_count, count)
              min_count = min(min_count, count)
              count = 0
      return (max_count - min_count)
source_cpp: int difference_between_highest_and_least_frequencies_in_an_array(vector<int> arr, int n) {
    sort(arr.begin(), arr.end());
    int count = 0, max_count = 0, min_count = n;
    for ( int i = 0;
    i < ( n - 1 );
    i ++ ) {
      if ( arr [ i ] == arr [ i + 1 ] ) {
        count += 1;
        continue;
      }
      else {
        max_count = max ( max_count, count );
        min_count = min ( min_count, count );
        count = 0;
      }
    }
    return ( max_count - min_count );
  }