title: Ways Remove One Element Binary String Xor Becomes Zero
signature: class Solution {
  
      public int WaysRemoveOneElementBinaryStringXorBecomesZero(string str) {
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(string str, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(str); 
                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(
                  "KfcTJNP", 
                  7
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  "05312505872", 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  "100111", 
                  2
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  "tDEEhKxrQ", 
                  9
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  "50824233019", 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  "10001110010", 
                  5
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  "T SEZaNm MYQ", 
                  12
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  "838415739", 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  "01110100", 
                  4
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  "WYQiAey H", 
                  9
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def ways_remove_one_element_binary_string_xor_becomes_zero(str):
      one_count = 0
      zero_count = 0
      n = len(str)
      for i in range(0, n, 1):
          if (str[i] == '1'):
              one_count += 1
          else:
              zero_count += 1
      if ((one_count % 2) == 0):
          return zero_count
      return one_count
source_cpp: int ways_remove_one_element_binary_string_xor_becomes_zero(string str) {
    int one_count = 0, zero_count = 0;
    int n = str . length ( );
    for ( int i = 0;
    i < n;
    i ++ ) if ( str [ i ] == '1' ) one_count ++;
    else zero_count ++;
    if ( one_count % 2 == 0 ) return zero_count;
    return one_count;
  }