title: Find Sum Non Repeating Distinct Elements Array
signature: def findSumNonRepeatingDistinctElementsArray(arr: List[Int], n: Int) = {
test_code: import scala.collection.mutable.HashMap
  import scala.collection.immutable.HashSet
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  
  // TESTING CODE 
  // ============================================
  def validateSolution(actual: Int , expected: Int): Boolean = {
      actual.toString == expected.toString
  }
  
  def driver(arr: List[Int], n: Int, expected: Int): String = {
      try {
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n),expected)) {
              "PASSED"
          } else{
              "FAILED"
          }
      }catch{
          case e: Exception => {e.getClass.getName}
      }
  
  }
  object QuestionEvaluator extends App {
  
      println(s"TEST-0...${driver(
        List(5, 6, 8, 10, 21, 22, 27, 32, 35, 36, 43, 44, 46, 48, 49, 55, 60, 61, 69, 69, 71, 72, 73, 78, 88, 94), 24, 
        971    
      )}")   
  
  
      println(s"TEST-1...${driver(
        List(80, 94, 16, -74, 32, -64, -84, -66, -10), 6, 
        84    
      )}")   
  
  
      println(s"TEST-2...${driver(
        List(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, 1, 1, 1, 1), 27, 
        1    
      )}")   
  
  
      println(s"TEST-3...${driver(
        List(99, 4, 96, 39, 39, 24, 15, 47, 25, 74, 7, 98, 88, 91, 62, 12, 31, 14, 48, 26, 37, 25, 11, 32, 34, 64, 72, 5, 80, 86, 6), 15, 
        769    
      )}")   
  
  
      println(s"TEST-4...${driver(
        List(-86, -84, -84, -78, -78, -76, -74, -68, -66, -64, -60, -60, -56, -50, -42, -42, -38, -34, -32, -22, -16, -14, -10, -6, -6, 4, 4, 26, 36, 36, 54, 62, 64, 68, 70, 76, 76, 76, 84, 92, 92, 94, 96), 27, 
        -972    
      )}")   
  
  
      println(s"TEST-5...${driver(
        List(1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1), 25, 
        1    
      )}")   
  
  
      println(s"TEST-6...${driver(
        List(3, 3, 5, 8, 32, 33, 35, 35, 42, 48, 67, 71, 71, 74, 77, 80, 94, 96, 96, 97), 19, 
        765    
      )}")   
  
  
      println(s"TEST-7...${driver(
        List(-50, -18, -66, 76, -54, 96, 98, 26, 42, 64, -60), 9, 
        150    
      )}")   
  
  
      println(s"TEST-8...${driver(
        List(0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1), 15, 
        1    
      )}")   
  
  
      println(s"TEST-9...${driver(
        List(70, 21, 44, 82, 62, 41, 86), 3, 
        135    
      )}")   
  
  }
  
source_py: def find_sum_non_repeating_distinct_elements_array(arr, n):
      s = set()
      sum = 0
      for i in range(n):
          if (arr[i] not in s):
              s.add(arr[i])
      for i in s:
          sum = (sum + i)
      return sum
source_cpp: int find_sum_non_repeating_distinct_elements_array(vector<int> arr, int n) {
    int sum = 0;
    unordered_set < int > s;
    for ( int i = 0;
    i < n;
    i ++ ) {
      if ( s . find ( arr [ i ] ) == s . end ( ) ) {
        sum += arr [ i ];
        s . insert ( arr [ i ] );
      }
    }
    return sum;
  }