title: Decode Median String Original String
signature: class Solution {
  
      public string DecodeMedianStringOriginalString(string s) {
test_code: using System;
  using System.Numerics;
  using System.Diagnostics;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Security.Cryptography;
  using System.Web.UI;
  using System.Web.Script.Serialization;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  namespace EvaluatePrediction {
      class TestRunner {
          public bool ValidateSolution(string actual, string expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(string s, string expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                string pred_result = solution_cls.PLACEHOLDER_FN_NAME(s); 
                if (ValidateSolution(
                      pred_result,
                      expected)){
                  return "PASSED";
                }
                return "FAILED";
              } 
              catch (Exception exception_obj)
              {
                return exception_obj.GetType().FullName;
              }
          }
          static void Main(string[] args) {
              TestRunner runner = new TestRunner();
              String result;
              result = runner.driver(
                  " EgvQCeqYpZtv", 
                  "tpqCvE gQeYZv"
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  "488540", 
                  "484850"
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  "0000101010111", 
                  "1000000011111"
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  "syw", 
                  "ysw"
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  "402355", 
                  "524035"
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  "0", 
                  "0"
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  "wmHMlAtq", 
                  "tlHwmMAq"
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  "7962", 
                  "6792"
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  "111111", 
                  "111111"
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  "UbgRGDquop", 
                  "oqGgUbRDup"
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
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;
  }