title: First Element Occurring K Times Array
signature: function firstElementOccurringKTimesArray(arr: Array<number>, n: number, k: number): number {
source_py: def first_element_occurring_k_times_array(arr, n, k):
      count_map = {
          
      }
      for i in range(0, n):
          if (arr[i] in count_map.keys()):
              count_map[arr[i]] += 1
          else:
              count_map[arr[i]] = 1
          i += 1
      for i in range(0, n):
          if (count_map[arr[i]] == k):
              return arr[i]
          i += 1
      return (- 1)
source_cpp: int first_element_occurring_k_times_array(vector<int> arr, int n, int k) {
    unordered_map < int, int > count_map;
    for ( int i = 0;
    i < n;
    i ++ ) count_map [ arr [ i ] ] ++;
    for ( int i = 0;
    i < n;
    i ++ ) if ( count_map [ arr [ i ] ] == k ) return arr [ i ];
    return - 1;
  }
question_info.test_list: [{"idx": 0, "outputs": 4, "inputs": {"arr": [2, 3, 4, 4, 7, 18, 20, 23, 27, 30, 31, 31, 32, 35, 36, 43, 45, 46, 49, 50, 53, 55, 59, 60, 64, 64, 65, 68, 78, 80, 80, 85, 95], "n": 30, "k": 2}}, {"idx": 1, "outputs": -1, "inputs": {"arr": [-26, 32, 36, 6, 64, 24, -28, 96], "n": 6, "k": 3}}, {"idx": 2, "outputs": -1, "inputs": {"arr": [0, 0, 0, 0, 0, 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], "n": 15, "k": 7}}, {"idx": 3, "outputs": 38, "inputs": {"arr": [38, 40, 43, 70, 20, 40, 95, 96, 81, 82], "n": 9, "k": 1}}, {"idx": 4, "outputs": -8, "inputs": {"arr": [-68, -8, -8, 16, 24, 54], "n": 3, "k": 2}}, {"idx": 5, "outputs": 0, "inputs": {"arr": [1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1], "n": 6, "k": 4}}, {"idx": 6, "outputs": 49, "inputs": {"arr": [13, 18, 19, 28, 31, 34, 49, 49, 53, 57, 58, 62, 75, 76, 77, 78, 80, 84, 84, 85, 87, 91, 98, 99], "n": 20, "k": 2}}, {"idx": 7, "outputs": -1, "inputs": {"arr": [-4, 24, -86, -84, 30, -16, 12, -92, -68, 22], "n": 6, "k": 5}}, {"idx": 8, "outputs": -1, "inputs": {"arr": [0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1], "n": 8, "k": 10}}, {"idx": 9, "outputs": -1, "inputs": {"arr": [55, 44, 75, 97, 25, 65, 76, 53, 20, 78, 25, 59, 61, 29, 81, 35, 15, 78, 41, 44, 31, 33, 39, 93, 26, 67], "n": 23, "k": 20}}]
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(arr: Array<number>, n: number, k: number, expected:number): string {
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n, k),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver([2, 3, 4, 4, 7, 18, 20, 23, 27, 30, 31, 31, 32, 35, 36, 43, 45, 46, 49, 50, 53, 55, 59, 60, 64, 64, 65, 68, 78, 80, 80, 85, 95], 30, 2, 4);
    console.log(`TEST-0...${result}`);
  
    result = driver([-26, 32, 36, 6, 64, 24, -28, 96], 6, 3, -1);
    console.log(`TEST-1...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 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], 15, 7, -1);
    console.log(`TEST-2...${result}`);
  
    result = driver([38, 40, 43, 70, 20, 40, 95, 96, 81, 82], 9, 1, 38);
    console.log(`TEST-3...${result}`);
  
    result = driver([-68, -8, -8, 16, 24, 54], 3, 2, -8);
    console.log(`TEST-4...${result}`);
  
    result = driver([1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1], 6, 4, 0);
    console.log(`TEST-5...${result}`);
  
    result = driver([13, 18, 19, 28, 31, 34, 49, 49, 53, 57, 58, 62, 75, 76, 77, 78, 80, 84, 84, 85, 87, 91, 98, 99], 20, 2, 49);
    console.log(`TEST-6...${result}`);
  
    result = driver([-4, 24, -86, -84, 30, -16, 12, -92, -68, 22], 6, 5, -1);
    console.log(`TEST-7...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1], 8, 10, -1);
    console.log(`TEST-8...${result}`);
  
    result = driver([55, 44, 75, 97, 25, 65, 76, 53, 20, 78, 25, 59, 61, 29, 81, 35, 15, 78, 41, 44, 31, 33, 39, 93, 26, 67], 23, 20, -1);
    console.log(`TEST-9...${result}`);
  
  };
  
  main();
question_info.extension: ts
question_info.entry_fn_name: firstElementOccurringKTimesArray
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