title: Calculate Maximum Value Using Sign Two Numbers String
signature: function calculateMaximumValueUsingSignTwoNumbersString($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(
        "pR", 
        2176));
      
      printf("TEST-1...%s\n",driver(
        "9518", 
        368));
      
      printf("TEST-2...%s\n",driver(
        "1", 
        1));
      
      printf("TEST-3...%s\n",driver(
        "3170487", 
        6272));
      
      printf("TEST-4...%s\n",driver(
        "0100101010", 
        4));
      
      printf("TEST-5...%s\n",driver(
        "Z rONcUqWb", 
        -303));
      
      printf("TEST-6...%s\n",driver(
        "00419297", 
        5670));
      
      printf("TEST-7...%s\n",driver(
        "00", 
        0));
      
      printf("TEST-8...%s\n",driver(
        "r", 
        66));
      
  }
  
  main();
  ?>
source_py: def calculate_maximum_value_using_sign_two_numbers_string(str):
      res = (ord(str[0]) - 48)
      for i in range(1, len(str)):
          if ((str[i] == '0') or (str[i] == '1') or (res < 2)):
              res += (ord(str[i]) - 48)
          else:
              res *= (ord(str[i]) - 48)
      return res
source_cpp: int calculate_maximum_value_using_sign_two_numbers_string(string str) {
    int res = str [ 0 ] - '0';
    for ( int i = 1;
    i < str . length ( );
    i ++ ) {
      if ( str [ i ] == '0' || str [ i ] == '1' || res < 2 ) res += ( str [ i ] - '0' );
      else res *= ( str [ i ] - '0' );
    }
    return res;
  }