title: Print Words String Reverse Order
signature: class Solution {
  
      public string PrintWordsStringReverseOrder(string str) {
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 str, string expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                string pred_result = solution_cls.PLACEHOLDER_FN_NAME(str); 
                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(
                  "m Dm YZ", 
                  "YZ Dm m"
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  "65 48 57 71", 
                  "71 57 48 65"
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  "01 010", 
                  "010 01"
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  "mT vhByi", 
                  "vhByi mT"
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  "19 44 9 1", 
                  "1 9 44 19"
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  "0", 
                  "0"
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  "z vUi  ", 
                  "  vUi z"
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  "7 591 36643 9 055", 
                  "055 9 36643 591 7"
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  "01", 
                  "01"
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  "ti YGaijPY", 
                  "YGaijPY ti"
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def print_words_string_reverse_order(str):
      i = (len(str) - 1)
      start = end = (i + 1)
      result = ''
      while (i >= 0):
          if (str[i] == ' '):
              start = (i + 1)
              while (start != end):
                  result += str[start]
                  start += 1
              result += ' '
              end = i
          i -= 1
      start = 0
      while (start != end):
          result += str[start]
          start += 1
      return result
source_cpp: string print_words_string_reverse_order(string str) {
    int i = str . length ( ) - 1;
    int start, end = i + 1;
    string result = "";
    while ( i >= 0 ) {
      if ( str [ i ] == ' ' ) {
        start = i + 1;
        while ( start != end ) result += str [ start ++ ];
        result += ' ';
        end = i;
      }
      i --;
    }
    start = 0;
    while ( start != end ) result += str [ start ++ ];
    return result;
  }