title: Array Range Queries Elements Frequency Value
signature: function array_range_queries_elements_frequency_value(start, end_arg1, arr)
test_code: using Printf
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  function validate_solution(actual, expected)
      return actual == expected
  end
  
  function driver(start, end_arg1, arr, expected)
      try
  
          if validate_solution(PLACEHOLDER_FN_NAME(start, end_arg1, arr), expected)
              return "PASSED";
          end
          return "FAILED";
      catch exception_obj
          return string(Base.typename(typeof(exception_obj)).wrapper);
      end
  end
  
  function main()
      
      result = driver(0, 31, [1, 2, 2, 3, 3, 3, 12, 13, 18, 18, 26, 28, 29, 36, 37, 39, 40, 49, 55, 57, 63, 69, 69, 73, 85, 86, 87, 87, 89, 89, 90, 91, 92, 93, 93, 93, 95, 99], 3);
      @printf("TEST-0...%s\n",result);
      
      result = driver(1, 25, [24, -62, 2, 1, 94, 56, -22, -70, -22, -34, -92, -18, 56, 2, 60, 38, -88, 16, -28, 30, -30, 58, -80, 94, 6, 56], 2);
      @printf("TEST-1...%s\n",result);
      
      result = driver(3, 4, [0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 1);
      @printf("TEST-2...%s\n",result);
      
      result = driver(10, 15, [84, 13, 81, 40, 87, 82, 50, 30, 90, 80, 81, 70, 14, 54, 72, 93, 78, 27, 61], 0);
      @printf("TEST-3...%s\n",result);
      
      result = driver(2, 3, [-20, 20, 34, 60, 90], 0);
      @printf("TEST-4...%s\n",result);
      
      result = driver(0, 6, [1, 0, 0, 0, 0, 0, 0, 0, 0, 0], 1);
      @printf("TEST-5...%s\n",result);
      
      result = driver(14, 18, [11, 18, 18, 19, 25, 30, 42, 42, 56, 58, 63, 66, 67, 68, 69, 75, 78, 83, 83], 0);
      @printf("TEST-6...%s\n",result);
      
      result = driver(29, 33, [-24, -82, 24, -84, 94, 2, -30, 86, 58, -56, -96, 60, -38, 76, 94, 74, -98, -84, -38, 46, 4, -84, -90, -28, -50, 46, 16, 28, -14, -82, -64, 42, 64, -2, -40, 96, 60, 2, -86, 32, 38, -66], 0);
      @printf("TEST-7...%s\n",result);
      
      result = driver(31, 19, [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], 0);
      @printf("TEST-8...%s\n",result);
      
      result = driver(21, 32, [2, 91, 42, 85, 97, 92, 24, 39, 63, 89, 31, 59, 51, 89, 72, 62, 26, 92, 75, 4, 6, 13, 20, 95, 22, 30, 52, 60, 37, 27, 49, 15, 67, 26], 0);
      @printf("TEST-9...%s\n",result);
      
  end
  
  main()
source_py: def array_range_queries_elements_frequency_value(start, end, arr):
      frequency = dict()
      for i in range(start, (end + 1)):
          if (arr[i] in frequency.keys()):
              frequency[arr[i]] += 1
          else:
              frequency[arr[i]] = 1
      count = 0
      for x in frequency:
          if (x == frequency[x]):
              count += 1
      return count
source_cpp: int array_range_queries_elements_frequency_value(int start, int end, vector<int> arr) {
    unordered_map < int, int > frequency;
    for ( int i = start;
    i <= end;
    i ++ ) frequency [ arr [ i ] ] ++;
    int count = 0;
    for ( auto x : frequency ) if ( x . first == x . second ) count ++;
    return count;
  }