title: First Element Occurring K Times Array
signature: fun firstElementOccurringKTimesArray(arr: ArrayList<Int>, n: Int, k: Int): Int {
test_code: package main
  
  import kotlin.text.*
  import kotlin.math.*
  
  
  // SOLUTION CODE
  // ===================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE
  // ===================================
  fun validateSolution(actual:Int, expected:Int):Boolean{
    return actual.equals(expected)
  }
  fun driver(arr: ArrayList<Int>, n: Int, k: Int, expected:Int):String {
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME(arr, n, k), expected)) {
                return "PASSED"
        }
        return "FAILED"
      } catch (e: Exception){
        return e::class.simpleName as String
      }
  
  }
  
  fun main() {
      var result: String = ""
      result = driver(arrayListOf(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)
      println("TEST-0...${result}")
      
      result = driver(arrayListOf(-26, 32, 36, 6, 64, 24, -28, 96), 6, 3, -1)
      println("TEST-1...${result}")
      
      result = driver(arrayListOf(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)
      println("TEST-2...${result}")
      
      result = driver(arrayListOf(38, 40, 43, 70, 20, 40, 95, 96, 81, 82), 9, 1, 38)
      println("TEST-3...${result}")
      
      result = driver(arrayListOf(-68, -8, -8, 16, 24, 54), 3, 2, -8)
      println("TEST-4...${result}")
      
      result = driver(arrayListOf(1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1), 6, 4, 0)
      println("TEST-5...${result}")
      
      result = driver(arrayListOf(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)
      println("TEST-6...${result}")
      
      result = driver(arrayListOf(-4, 24, -86, -84, 30, -16, 12, -92, -68, 22), 6, 5, -1)
      println("TEST-7...${result}")
      
      result = driver(arrayListOf(0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1), 8, 10, -1)
      println("TEST-8...${result}")
      
      result = driver(arrayListOf(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)
      println("TEST-9...${result}")
      
          
  }
  
  main()
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;
  }