title: Ways Remove One Element Binary String Xor Becomes Zero
signature: function waysRemoveOneElementBinaryStringXorBecomesZero($str) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return serialize($actual) == serialize($expected);
  }
  
  function driver($str, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($str), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        "KfcTJNP", 
        7));
      
      printf("TEST-1...%s\n",driver(
        "05312505872", 
        1));
      
      printf("TEST-2...%s\n",driver(
        "100111", 
        2));
      
      printf("TEST-3...%s\n",driver(
        "tDEEhKxrQ", 
        9));
      
      printf("TEST-4...%s\n",driver(
        "50824233019", 
        1));
      
      printf("TEST-5...%s\n",driver(
        "10001110010", 
        5));
      
      printf("TEST-6...%s\n",driver(
        "T SEZaNm MYQ", 
        12));
      
      printf("TEST-7...%s\n",driver(
        "838415739", 
        1));
      
      printf("TEST-8...%s\n",driver(
        "01110100", 
        4));
      
      printf("TEST-9...%s\n",driver(
        "WYQiAey H", 
        9));
      
  }
  
  main();
  ?>
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;
  }