title: Number Indexes Equal Elements Given Range
signature: class Solution {
  
      public int NumberIndexesEqualElementsGivenRange(List<int> a, int n, int l, int r) {
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> a, int n, int l, int r, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(a, n, l, r); 
                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>{4, 13, 13, 16, 16, 19, 39, 41, 48, 52, 57, 62, 65, 67, 76, 84, 88, 91, 95, 96, 97, 98}, 18, 12, 17, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{62, 76, 86, -8, 84, -6, 72, 84, 6, -50, -18, -94, 54, 90, -74, -64, -26, -14, -32, 62, 10, 4, 70, -28, 8, 18, 4, -62, -76, 84, -78, -4, 84, 98, 58, -68, 42, -6, 34, -38, 52, -84, 78}, 32, 38, 23, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1}, 10, 6, 6, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{11, 75, 98, 29, 62, 53, 48, 91, 86, 66, 48, 94}, 8, 6, 6, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-94, -84, -70, -70, -40, -40, -36, -24, 10, 48, 62, 74}, 11, 7, 8, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0}, 36, 40, 37, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{1, 2, 6, 7, 10, 11, 13, 19, 19, 25, 29, 30, 32, 34, 35, 45, 45, 46, 47, 48, 48, 53, 58, 61, 64, 65, 67, 75, 76, 81, 81, 84, 84, 85, 86, 94, 94, 96, 99}, 25, 19, 37, 
                  4
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-56, 42, -34, -12, -86, 82, -96, -66, 30, 16, -40, 72, 84, 94, -48, -30, 26, 50, 42, -44, -50, 22, -38, 8, 34, 94, 2, 16, -32, 18, -58, 12, -26, 28, -62}, 21, 30, 26, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 1, 1, 1}, 4, 5, 5, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{6, 29}, 1, 1, 1, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def number_indexes_equal_elements_given_range(a, n, l, r):
      count = 0
      for i in range(l, r):
          if (a[i] == a[(i + 1)]):
              count += 1
      return count
source_cpp: int number_indexes_equal_elements_given_range(vector<int> a, int n, int l, int r) {
    int count = 0;
    for ( int i = l;
    i < r;
    i ++ ) if ( a [ i ] == a [ i + 1 ] ) count += 1;
    return count;
  }