title: Number Indexes Equal Elements Given Range
signature: numberIndexesEqualElementsGivenRange(a, n, l, r) {
test_code: import 'dart:convert';
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual.toString() == expected.toString();
  }
  
  String driver(a, n, l, r, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(a, n, l, r), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          [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)
      }");
  
      print("TEST-1...${driver(
          [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)
      }");
  
      print("TEST-2...${driver(
          [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1], 10, 6, 6, 
          0)
      }");
  
      print("TEST-3...${driver(
          [11, 75, 98, 29, 62, 53, 48, 91, 86, 66, 48, 94], 8, 6, 6, 
          0)
      }");
  
      print("TEST-4...${driver(
          [-94, -84, -70, -70, -40, -40, -36, -24, 10, 48, 62, 74], 11, 7, 8, 
          0)
      }");
  
      print("TEST-5...${driver(
          [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)
      }");
  
      print("TEST-6...${driver(
          [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)
      }");
  
      print("TEST-7...${driver(
          [-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)
      }");
  
      print("TEST-8...${driver(
          [0, 0, 0, 0, 1, 1, 1], 4, 5, 5, 
          0)
      }");
  
      print("TEST-9...${driver(
          [6, 29], 1, 1, 1, 
          0)
      }");
  
      return 0;
  }
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;
  }