title: Ways Remove One Element Binary String Xor Becomes Zero
signature: function waysRemoveOneElementBinaryStringXorBecomesZero(str) {
test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value) {
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual, expected){
      return convertToString(actual)===convertToString(expected);
  }
  
  function driver(str, expected){
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(str),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver("KfcTJNP", 7);
    console.log(`TEST-0...${result}`);
  
    result = driver("05312505872", 1);
    console.log(`TEST-1...${result}`);
  
    result = driver("100111", 2);
    console.log(`TEST-2...${result}`);
  
    result = driver("tDEEhKxrQ", 9);
    console.log(`TEST-3...${result}`);
  
    result = driver("50824233019", 1);
    console.log(`TEST-4...${result}`);
  
    result = driver("10001110010", 5);
    console.log(`TEST-5...${result}`);
  
    result = driver("T SEZaNm MYQ", 12);
    console.log(`TEST-6...${result}`);
  
    result = driver("838415739", 1);
    console.log(`TEST-7...${result}`);
  
    result = driver("01110100", 4);
    console.log(`TEST-8...${result}`);
  
    result = driver("WYQiAey H", 9);
    console.log(`TEST-9...${result}`);
  
    process.exit(0);
  };
  
  if (require.main === module) {
    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;
  }