title: K Th Distinct Or Non Repeating Element In An Array 1
signature: class Solution {
  
      public int KThDistinctOrNonRepeatingElementInAnArray1(List<int> arr, int size, int kthindex) {
test_code: using System;
  using System.Numerics;
  using System.Diagnostics;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Security.Cryptography;
  using System.Web.UI;
  using System.Web.Script.Serialization;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  namespace EvaluatePrediction {
      class TestRunner {
          public bool ValidateSolution(int actual, int expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> arr, int size, int kthindex, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(arr, size, kthindex); 
                if (ValidateSolution(
                      pred_result,
                      expected)){
                  return "PASSED";
                }
                return "FAILED";
              } 
              catch (Exception exception_obj)
              {
                return exception_obj.GetType().FullName;
              }
          }
          static void Main(string[] args) {
              TestRunner runner = new TestRunner();
              String result;
              result = runner.driver(
                  new List<int>{17, 25, 27, 27, 73, 91}, 5, 3, 
                  73
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-86, -74, -88, 28, -32, 20, -34, 32}, 5, 6, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 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, 1, 1, 1, 1}, 33, 32, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{5, 11, 36, 27, 6, 24, 58, 44, 14, 68}, 7, 5, 
                  6
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-98, -98, -94, -92, -86, -86, -70, -66, -64, -64, -58, -52, -46, -44, -44, -38, -38, -28, -24, -12, -10, -4, -2, 2, 8, 10, 12, 20, 22, 26, 26, 36, 42, 52, 54, 60, 60, 68, 82, 82, 92, 98}, 27, 27, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1}, 27, 20, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{3, 8, 9, 10, 10, 13, 14, 16, 18, 23, 24, 25, 27, 28, 30, 33, 36, 39, 42, 42, 44, 45, 45, 48, 52, 52, 55, 55, 59, 59, 59, 60, 61, 61, 66, 66, 67, 68, 71, 72, 75, 76, 79, 80, 94, 94}, 44, 26, 
                  79
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-12, 56, -48, 52, -96, -84, 32, -12, -6, 82, 70, 18, 66, -6, -22, -46, -54, 18, -14, -32, 68, 82, -44, -42, 10, 56, 8, -56, 24, 20, -38, 30, -52, -66, 82, -64, 68, -82, 52, -88, -34, -26, 94, 58, -4, -84, -60}, 37, 46, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 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, 1, 1, 1, 1, 1}, 22, 21, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{1, 23, 75, 84, 28, 34, 15, 13, 51, 69, 94, 45, 38, 38}, 13, 12, 
                  45
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def k_th_distinct_or_non_repeating_element_in_an_array_1(arr, size, KthIndex):
      dict = {
          
      }
      vect = []
      for i in range(size):
          if (arr[i] in dict):
              dict[arr[i]] = (dict[arr[i]] + 1)
          else:
              dict[arr[i]] = 1
      for i in range(size):
          if (dict[arr[i]] > 1):
              continue
          else:
              KthIndex = (KthIndex - 1)
          if (KthIndex == 0):
              return arr[i]
      return (- 1)
source_cpp: int k_th_distinct_or_non_repeating_element_in_an_array_1(vector<int> arr, int n, int k) {
    unordered_map < int, int > h;
    for ( int i = 0;
    i < n;
    i ++ ) h [ arr [ i ] ] ++;
    if ( h . size ( ) < k ) return - 1;
    int dist_count = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      if ( h [ arr [ i ] ] == 1 ) dist_count ++;
      if ( dist_count == k ) return arr [ i ];
    }
    return - 1;
  }