title: K Th Distinct Or Non Repeating Element In An Array
signature: kThDistinctOrNonRepeatingElementInAnArray(arr, n, k) {
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(arr, n, k, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n, k), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          [2, 3, 8, 18, 20, 33, 53, 56, 60, 71, 76, 80, 81, 87, 88, 89, 92, 95], 16, 16, 
          89)
      }");
  
      print("TEST-1...${driver(
          [-78, 6, 32, 52, -12, -32, 22, -40, -82, 24, 30, 10, -40], 8, 6, 
          -32)
      }");
  
      print("TEST-2...${driver(
          [0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1], 7, 5, 
          -1)
      }");
  
      print("TEST-3...${driver(
          [3, 28, 55, 21, 42, 60, 96, 83, 98, 75, 29, 73, 51, 21, 27, 65, 19, 47, 12, 81, 19, 94, 50, 43, 21, 32, 52, 44, 52, 91, 49, 59, 52, 10, 75, 86, 46, 43, 3, 49, 70, 60, 77, 99, 27, 63], 40, 39, 
          -1)
      }");
  
      print("TEST-4...${driver(
          [-96, -90, -76, -44, -16, -8, 0, 0, 2, 2, 8, 14, 16, 18, 18, 20, 20, 28, 34, 44, 68, 74, 84, 90], 23, 12, 
          44)
      }");
  
      print("TEST-5...${driver(
          [0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0], 10, 8, 
          -1)
      }");
  
      print("TEST-6...${driver(
          [3, 4, 5, 8, 9, 15, 26, 26, 26, 35, 39, 40, 42, 43, 45, 45, 48, 52, 54, 56, 57, 67, 74, 77, 79, 80, 81, 86, 87, 92, 95, 97], 26, 24, 
          -1)
      }");
  
      print("TEST-7...${driver(
          [-76, -24, -12, 66, -40, 26, 72, 46, -56, 58, -68, 2, -82], 6, 10, 
          -1)
      }");
  
      print("TEST-8...${driver(
          [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, 1, 1, 1, 1, 1], 27, 17, 
          -1)
      }");
  
      print("TEST-9...${driver(
          [29, 83, 32, 75, 5, 22, 68, 64, 36, 18, 7, 63, 16, 42, 77, 61, 1, 26, 12, 41, 67, 85, 85, 35, 94, 18, 14, 65, 8, 55, 44, 34, 48, 23, 8, 27, 86, 2, 51, 91], 28, 24, 
          65)
      }");
  
      return 0;
  }
source_py: def k_th_distinct_or_non_repeating_element_in_an_array(arr, n, k):
      dist_count = 0
      for i in range(n):
          j = 0
          while (j < n):
              if ((i != j) and (arr[j] == arr[i])):
                  break
              j += 1
          if (j == n):
              dist_count += 1
          if (dist_count == k):
              return arr[i]
      return (- 1)
source_cpp: int k_th_distinct_or_non_repeating_element_in_an_array(vector<int> arr, int n, int k) {
    int dist_count = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      int j;
      for ( j = 0;
      j < n;
      j ++ ) if ( i != j && arr [ j ] == arr [ i ] ) break;
      if ( j == n ) dist_count ++;
      if ( dist_count == k ) return arr [ i ];
    }
    return - 1;
  }