title: Number Indexes Equal Elements Given Range
signature: function numberIndexesEqualElementsGivenRange(a: Array<number>, n: number, l: number, r: number): number {
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;
  }
question_info.test_list: [{"idx": 0, "outputs": 0, "inputs": {"a": [4, 13, 13, 16, 16, 19, 39, 41, 48, 52, 57, 62, 65, 67, 76, 84, 88, 91, 95, 96, 97, 98], "n": 18, "l": 12, "r": 17}}, {"idx": 1, "outputs": 0, "inputs": {"a": [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], "n": 32, "l": 38, "r": 23}}, {"idx": 2, "outputs": 0, "inputs": {"a": [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1], "n": 10, "l": 6, "r": 6}}, {"idx": 3, "outputs": 0, "inputs": {"a": [11, 75, 98, 29, 62, 53, 48, 91, 86, 66, 48, 94], "n": 8, "l": 6, "r": 6}}, {"idx": 4, "outputs": 0, "inputs": {"a": [-94, -84, -70, -70, -40, -40, -36, -24, 10, 48, 62, 74], "n": 11, "l": 7, "r": 8}}, {"idx": 5, "outputs": 0, "inputs": {"a": [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], "n": 36, "l": 40, "r": 37}}, {"idx": 6, "outputs": 4, "inputs": {"a": [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], "n": 25, "l": 19, "r": 37}}, {"idx": 7, "outputs": 0, "inputs": {"a": [-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], "n": 21, "l": 30, "r": 26}}, {"idx": 8, "outputs": 0, "inputs": {"a": [0, 0, 0, 0, 1, 1, 1], "n": 4, "l": 5, "r": 5}}, {"idx": 9, "outputs": 0, "inputs": {"a": [6, 29], "n": 1, "l": 1, "r": 1}}]
question_info.entry_cls_name: Solution
question_info.test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value: any): string{
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual: number, expected: number): boolean {
      return convertToString(actual) === convertToString(expected);
  }
  
  function driver(a: Array<number>, n: number, l: number, r: number, expected:number): string {
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(a, n, l, r),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = 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);
    console.log(`TEST-0...${result}`);
  
    result = 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);
    console.log(`TEST-1...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1], 10, 6, 6, 0);
    console.log(`TEST-2...${result}`);
  
    result = driver([11, 75, 98, 29, 62, 53, 48, 91, 86, 66, 48, 94], 8, 6, 6, 0);
    console.log(`TEST-3...${result}`);
  
    result = driver([-94, -84, -70, -70, -40, -40, -36, -24, 10, 48, 62, 74], 11, 7, 8, 0);
    console.log(`TEST-4...${result}`);
  
    result = 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);
    console.log(`TEST-5...${result}`);
  
    result = 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);
    console.log(`TEST-6...${result}`);
  
    result = 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);
    console.log(`TEST-7...${result}`);
  
    result = driver([0, 0, 0, 0, 1, 1, 1], 4, 5, 5, 0);
    console.log(`TEST-8...${result}`);
  
    result = driver([6, 29], 1, 1, 1, 0);
    console.log(`TEST-9...${result}`);
  
  };
  
  main();
question_info.extension: ts
question_info.entry_fn_name: numberIndexesEqualElementsGivenRange
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: tsc --target es2020 --lib es5,dom,es2015,es2020 __FILENAME__
question_info.commands: node __FILENAME__.js