title: Decode Median String Original String
signature: function decodeMedianStringOriginalString($s) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return serialize($actual) == serialize($expected);
  }
  
  function driver($s, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($s), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        " EgvQCeqYpZtv", 
        "tpqCvE gQeYZv"));
      
      printf("TEST-1...%s\n",driver(
        "488540", 
        "484850"));
      
      printf("TEST-2...%s\n",driver(
        "0000101010111", 
        "1000000011111"));
      
      printf("TEST-3...%s\n",driver(
        "syw", 
        "ysw"));
      
      printf("TEST-4...%s\n",driver(
        "402355", 
        "524035"));
      
      printf("TEST-5...%s\n",driver(
        "0", 
        "0"));
      
      printf("TEST-6...%s\n",driver(
        "wmHMlAtq", 
        "tlHwmMAq"));
      
      printf("TEST-7...%s\n",driver(
        "7962", 
        "6792"));
      
      printf("TEST-8...%s\n",driver(
        "111111", 
        "111111"));
      
      printf("TEST-9...%s\n",driver(
        "UbgRGDquop", 
        "oqGgUbRDup"));
      
  }
  
  main();
  ?>
source_py: def decode_median_string_original_string(s):
      l = len(s)
      s1 = ''
      if ((l % 2) == 0):
          isEven = True
      else:
          isEven = False
      for i in range(0, l, 2):
          if isEven:
              s1 = (s[i] + s1)
              s1 += s[(i + 1)]
          elif ((l - i) > 1):
              s1 += s[i]
              s1 = (s[(i + 1)] + s1)
          else:
              s1 += s[i]
      return s1
source_cpp: string decode_median_string_original_string(string s) {
    int l = s . length ( );
    string s1 = "";
    bool isEven = ( l % 2 == 0 ) ? true : false;
    for ( int i = 0;
    i < l;
    i += 2 ) {
      if ( isEven ) {
        s1 = s [ i ] + s1;
        s1 += s [ i + 1 ];
      }
      else {
        if ( l - i > 1 ) {
          s1 += s [ i ];
          s1 = s [ i + 1 ] + s1;
        }
        else {
          s1 += s [ i ];
        }
      }
    }
    return s1;
  }