title: Ways Remove One Element Binary String Xor Becomes Zero
signature: ways_remove_one_element_binary_string_xor_becomes_zero <- function(str) {
test_code: 
  
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  validate_solution <- function(actual, expected) {
      toString(actual)==toString(expected)
  }
  
  driver <- function(str, expected){
      if (validate_solution(PLACEHOLDER_FN_NAME(str), expected)){
          "PASSED"
      } else{
          "FAILED"
      }
  }
  
  main <- function() {
      cat(sprintf("TEST-0...%s\n",driver(
          "KfcTJNP", 
          7L
      )))
  
      cat(sprintf("TEST-1...%s\n",driver(
          "05312505872", 
          1L
      )))
  
      cat(sprintf("TEST-2...%s\n",driver(
          "100111", 
          2L
      )))
  
      cat(sprintf("TEST-3...%s\n",driver(
          "tDEEhKxrQ", 
          9L
      )))
  
      cat(sprintf("TEST-4...%s\n",driver(
          "50824233019", 
          1L
      )))
  
      cat(sprintf("TEST-5...%s\n",driver(
          "10001110010", 
          5L
      )))
  
      cat(sprintf("TEST-6...%s\n",driver(
          "T SEZaNm MYQ", 
          12L
      )))
  
      cat(sprintf("TEST-7...%s\n",driver(
          "838415739", 
          1L
      )))
  
      cat(sprintf("TEST-8...%s\n",driver(
          "01110100", 
          4L
      )))
  
      cat(sprintf("TEST-9...%s\n",driver(
          "WYQiAey H", 
          9L
      )))
  
  }
  
  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;
  }