#include <iostream.h>
#include <fstream.h>
#include <string.h>
#include <stdio.h>

void main ()
{
 fstream log_book;
 char buffer[1000];
 char name[1000], email[1000], url[1000];
 char comments[1000];
 int i, j, ns, es, us, cs;
 char hold1, hold2, hold3, hold4;
 
 log_book.open 
  ("log.html", ios::out | ios::in);
 log_book.seekp (0, ios::end);
 
 cin >> buffer;

/*

The default value (that is, if you
don't use the ENCTYPE attribute at
all) is
ENCTYPE=
"application/x-www-form-urlencoded".
This should be used for cgi
programs.

When a string is encoded in the
"x-www-form-urlencoded" form, this
is what happens:

The ASCII characters 'a' through
'z', 'A' through 'Z', and '0'
through '9' remain the same.

The space character ' ' is converted
into a plus sign '+'.

All other ASCII characters are
converted into the 3-character
string "%xy", where xy is the
two-digit hexadecimal representation
of the character code

Line feeds are %0A and carriage
returns are %0D

The string that comes from the form
looks like:

name=value&name=value&name=value....

where "name" is the name of a field
in the form and "value" is the
character string in the field

*/

 // Turn all +, &, LF, CR into blanks
 for (i=0; i<1000; i++)
  {
   if (buffer[i]=='+') buffer[i]=' ';
   if (buffer[i]=='&') buffer[i]=' ';
   if (buffer[i]=='%' 
      && buffer[i+1]=='0' 
      && buffer[i+2]=='A') 
      buffer[i]=buffer[i+1]=
      buffer[i+2]=' ';
   if (buffer[i]=='%' 
      && buffer[i+1]=='0' 
      && buffer[i+2]=='D') 
      buffer[i]=buffer[i+1]=
      buffer[i+2]=' ';
  }


    //%21 = !
    //%22 = "
    //%23 = #
    //%24 = $
    //%25 = %
    //%26 = &
    //%27 = '
    //%28 = (
    //%29 = )
    //%2A = *
    //%2B = +
    //%2C = ,
    //%2D = -
    //%2E = .
    //%2F = /
    //%3A = :
    //%3B = ;
    //%3C = <
    //%3D = =
    //%3E = >
    //%3F = ?
    //%40 = @
    //%5B = [
    //%5C = \
    //%5D = ]
    //%5E = ^
    //%5F = _
    //%60 = `
    //%7B = {
    //%7C = |
    //%7D = }
    //%7E = ~

 for (i=0; i<1000; i++)
  {
   if (buffer[i]=='%' 
       && buffer[i+1]=='2' 
       && buffer[i+2]=='1') 
    {
     buffer[i]='!';
     for (j=i+1; j<998; j++)
      {
       buffer[j]=buffer[j+2];
      }
    }
  }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='2') 
         {
          buffer[i]='"';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='3') 
         {
          buffer[i]='#';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='4') 
         {
          buffer[i]='$';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='5') 
         {
          buffer[i]='%';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='6') 
         {
          buffer[i]=38;
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='7') 
         {
          buffer[i]='\'';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='8') 
         {
          buffer[i]='(';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='9') 
         {
          buffer[i]=')';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='A') 
         {
          buffer[i]='*';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='B') 
         {
          buffer[i]='+';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='C') 
         {
          buffer[i]=',';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='D') 
         {
          buffer[i]='-';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='E') 
         {
          buffer[i]='.';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='2' && buffer[i+2]=='F') 
         {
          buffer[i]='/';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='A') 
         {
          buffer[i]=':';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='B') 
         {
          buffer[i]=';';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='C') 
         {
          buffer[i]='<';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='D') 
         {
          buffer[i]='=';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='E') 
         {
          buffer[i]='>';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='3' && buffer[i+2]=='F') 
         {
          buffer[i]='?';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='4' && buffer[i+2]=='0') 
         {
          buffer[i]='@';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='5' && buffer[i+2]=='B') 
         {
          buffer[i]='[';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='5' && buffer[i+2]=='C') 
         {
          buffer[i]='\\';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='5' && buffer[i+2]=='D') 
         {
          buffer[i]=']';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='5' && buffer[i+2]=='E') 
         {
          buffer[i]='^';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='5' && buffer[i+2]=='F') 
         {
          buffer[i]='_';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='6' && buffer[i+2]=='0') 
         {
          buffer[i]='`';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='7' && buffer[i+2]=='B') 
         {
          buffer[i]='{';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='7' && buffer[i+2]=='C') 
         {
          buffer[i]='|';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='7' && buffer[i+2]=='D') 
         {
          buffer[i]='}';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

    for (i=0; i<1000; i++)
      {
       if (buffer[i]=='%' && buffer[i+1]=='7' && buffer[i+2]=='E') 
         {
          buffer[i]='~';
          for (j=i+1; j<998; j++)
            {
             buffer[j]=buffer[j+2];
            }
         }
      }

 // Isolate the Name, Email, Url,
 // and Comment strings
 
 for (i=0; i<1000; i++)
   {
    if (buffer[i]=='N' 
       && buffer[i+1]=='=')
       ns=i+2;
    if (buffer[i]=='E' 
       && buffer[i+1]=='=')
       es=i+2;
    if (buffer[i]=='U' 
       && buffer[i+1]=='=')
       us=i+2;
    if (buffer[i]=='C' 
       && buffer[i+1]=='=')
       cs=i+2;
   }
 
 for (i=0; i<1000; i++)
   {
    name[i]=buffer[ns+i];
    if (ns+i+1 == es-2) 
      {
       name[i+1]='\0';
       break;
      }
   }
 
 for (i=0; i<1000; i++)
   {
    email[i]=buffer[es+i];
    if (es+i+1 == us-2)
      {
       email[i+1]='\0';
       break;
      }
   }
 
 for (i=0; i<1000; i++)
   {
    url[i]=buffer[us+i];
    if (us+i+1 == cs-2)
      {
       url[i+1]='\0';
       break;
      }
   }
 
 for (i=0; i<750; i++)
   {
    comments[i]=buffer[cs+i];
   }
 
 log_book << "<HR NOSHADE SIZE=5>";
 log_book << "NAME:  " << name 
          << "<BR>";
 log_book << "E-MAIL ADDRESS:  ";
 log_book << "<A HREF=\"mailto:" 
          << email << "\">" 
          << email;
 log_book << "</A>" << "<BR>";
 log_book << "URL:  ";
 log_book << "<A HREF=\"" << url 
          << "\">" << url;
 log_book << "</A>" << "<BR>";
 log_book << "Comment or Message:  " 
          << comments << "<BR>";
 log_book << endl;
 
 cout << "Content-type: text/html\n\n";
 cout << "<HTML>";
 cout << "<HEAD>";
 cout << "<TITLE>Posting a message
          to the message board...
          </TITLE>";
 cout << "</HEAD>"; 
 cout << "<BODY BGCOLOR=\"FFFFFF\">";
 cout << "<H2>";
 cout << "Thank you for your
          contribution to the ";
 cout << "<A HREF=\"
          http://www-cgi.cs.purdue.edu/
          cgi-bin/bxd/viewlog.cgi\">";
 cout << "log book</A>.";
 cout << "</H2>";
 
 cout << "<HR NOSHADE SIZE=5>";
 cout << "NAME:  " << name << "<BR>";
 cout << "E-MAIL ADDRESS:  ";
 cout << "<A HREF=\"mailto:" << email 
      << "\">" << email;
 cout << "</A>" << "<BR>";
 cout << "URL:  ";
 cout << "<A HREF=\"" << url << "\">" 
      << url;
 cout << "</A>" << "<BR>";
 cout << "Comment or Message:  " 
      << comments << "<BR>";
 cout << endl;
 
 cout << "</BODY>";
 cout << "</HTML>";

}