title: Check If All The Elements Can Be Made Of Same Parity By Inverting Adjacent Elements
signature: class Solution {
  
      public bool CheckIfAllTheElementsCanBeMadeOfSameParityByInvertingAdjacentElements(List<int> a, int n) {
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(bool actual, bool expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> a, int n, bool expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                bool pred_result = solution_cls.PLACEHOLDER_FN_NAME(a, n); 
                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>{1, 1, 1, 7, 7, 8, 10, 10, 10, 14, 15, 18, 20, 23, 24, 24, 26, 30, 32, 32, 33, 36, 42, 43, 46, 48, 51, 51, 52, 53, 58, 58, 59, 59, 59, 60, 67, 71, 72, 74, 76, 77, 83, 84, 86, 90, 91}, 30, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-90, -20, -60, -64, -24, 84, -2, -32, 28, -54, 44, -96, 52, 88, 20, -56, -2}, 12, 
                  true
              );
              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, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 36, 
                  false
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{98, 70, 24, 18, 7, 4, 78, 19, 70, 56, 99, 54, 69, 15, 88, 20, 40, 13, 19, 56, 62}, 19, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-72, -66, -58, -20, 36, 80, 92}, 6, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 1}, 1, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{6, 13, 14, 16, 21, 26, 26, 28, 29, 35, 38, 42, 47, 47, 62, 67, 77, 81, 81, 83, 84, 88, 90, 96, 97, 98}, 17, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-48, -8, 20, 32, -90, -42, -6, -88, -72, 42, 66, -62, 82, -4, 8, 12, -22, 82, 56, 96, -54, 92, -42, 30, -18, 14, -6, -66, 34, 16, -84, -94, 48, -48, 52, -60, -92, -16}, 35, 
                  true
              );
              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, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 14, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{45, 86, 53, 80, 27, 45, 1, 85, 91, 93, 92, 43, 75, 86, 81, 48, 21, 34, 5, 10, 88, 42, 7, 15, 96, 85, 62, 86, 52, 37}, 29, 
                  true
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def check_if_all_the_elements_can_be_made_of_same_parity_by_inverting_adjacent_elements(a, n):
      count_odd = 0
      count_even = 0
      for i in range(n):
          if (a[i] & 1):
              count_odd += 1
          else:
              count_even += 1
      if ((count_odd % 2) and (count_even % 2)):
          return False
      else:
          return True
source_cpp: bool check_if_all_the_elements_can_be_made_of_same_parity_by_inverting_adjacent_elements(vector<int> a, int n) {
    int count_odd = 0, count_even = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      if ( a [ i ] & 1 ) count_odd ++;
      else count_even ++;
    }
    if ( count_odd % 2 && count_even % 2 ) return false;
    else return true;
  }