title: Array Range Queries Elements Frequency Value
signature: func arrayRangeQueriesElementsFrequencyValue(start int, end_arg1 int, arr []int) int {
test_code: package main
  
  import (
      "fmt"
      "reflect"
      "math"
      "sort"
  )
  
  // SOLUTION CODE
  // ===================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE
  // ===================================
  func validateSolution(actual int, expected int) bool {
      return reflect.DeepEqual(actual,expected)
  }
  
  func driver(start int, end_arg1 int, arr []int, expected int) string {
      if validateSolution(PLACEHOLDER_FN_NAME(start, end_arg1, arr),expected) {
              return "PASSED"
      }
      return "FAILED"
  
  }
  
  func main() {
  
      // Use imports to avoid undefined errors
      var _ = reflect.DeepEqual
      _ = math.Abs
      _ = sort.Sort
      result := ""
      result = driver(0, 
  	31, 
  	[]int{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)
      fmt.Printf("TEST-0...%s\n", result)
      
      result = driver(1, 
  	25, 
  	[]int{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)
      fmt.Printf("TEST-1...%s\n", result)
      
      result = driver(3, 
  	4, 
  	[]int{0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 1)
      fmt.Printf("TEST-2...%s\n", result)
      
      result = driver(10, 
  	15, 
  	[]int{84, 13, 81, 40, 87, 82, 50, 30, 90, 80, 81, 70, 14, 54, 72, 93, 78, 27, 61}, 0)
      fmt.Printf("TEST-3...%s\n", result)
      
      result = driver(2, 
  	3, 
  	[]int{-20, 20, 34, 60, 90}, 0)
      fmt.Printf("TEST-4...%s\n", result)
      
      result = driver(0, 
  	6, 
  	[]int{1, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 1)
      fmt.Printf("TEST-5...%s\n", result)
      
      result = driver(14, 
  	18, 
  	[]int{11, 18, 18, 19, 25, 30, 42, 42, 56, 58, 63, 66, 67, 68, 69, 75, 78, 83, 83}, 0)
      fmt.Printf("TEST-6...%s\n", result)
      
      result = driver(29, 
  	33, 
  	[]int{-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)
      fmt.Printf("TEST-7...%s\n", result)
      
      result = driver(31, 
  	19, 
  	[]int{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)
      fmt.Printf("TEST-8...%s\n", result)
      
      result = driver(21, 
  	32, 
  	[]int{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)
      fmt.Printf("TEST-9...%s\n", result)
      
          
  }
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;
  }