diff --git a/README.md b/README.md
index 45828ad..e33256b 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,55 @@ This repository is for anyone to create pull requests during Hacktoberfest 2018,
 
 Start adding your names here:
 
+### Rui Li
+- Software Engineer in NZ
+- [![twitter-alt][twitter-img]](https://twitter.com/RuiLi15)
+  [![github-alt][github-img]](https://github.com/gitruili)
+
+### Aditya Kolsur
+- I'm a 3rd year student.
+- I am a web developer.
+- [![github-alt][github-img]](https://github.com/adikolsur)
+
+### Bir Singh
+- I am a young developer in India interested in c++,html/css,java(android).
+- I'm currently a computer science student!
+- My hobbies include:
+  - Coding
+  - Gaming
+- [![github-alt][github-img]](https://github.com/singhbir)
+
+### Hafpaf
+- Software student
+- Small electronics enthutiast.
+- [![github-alt][github-img]](https://github.com/hafpaf)
+
+### Aditya Choudhary
+- Software Engineer in India
+- [![twitter-alt][twitter-img]](https://twitter.com/webmasteradi)
+  [![github-alt][github-img]](https://github.com/adich23)
+
+### Akshay N Shaju
+- Software Developer From India.🇧
+- Hobbies:
+  - Coding
+  - Gaming
+- [![twitter-alt][twitter-img]](https://twitter.com/akshaynshaju)
+  [![github-alt][github-img]](https://github.com/Akshay-N-Shaju)
+
+### Celso Uliana
+- Last year student.
+- Perl and Node enthusiastic.
+- Regex, automating and graphs.
+- [![github-alt][github-img]](https://github.com/CelsoUliana)
+  [![facebook-alt][facebook-img]](https://www.facebook.com/profile.php?id=100009599017240&ref=bookmarks)
+
+### Alok Rajasukumaran
+- AI Architect by profession
+- [!Know more at](https://alokraj68.in)
+- [![twitter-alt][twitter-img]](https://twitter.com/alokraj68)
+  [![github-alt][github-img]](https://github.com/alokraj68)
+
 ### Ananya
 - I'm a junior year student.
 - I am an Android Developer. I also work on other technologies such as web development using Django and Machine Learning.
@@ -131,6 +180,20 @@ Start adding your names here:
   - [![twitter-alt][twitter-img]](https://twitter.com/akshaynshaju)
     [![github-alt][github-img]](https://github.com/Akshay-N-Shaju)
 
+### duongoku
+- I'm a student and I'm in last year of highschool.
+- I'm interested in competitive programming, physics, calculus and tech stuff.
+- I also like listening to music and playing games.
+- [![twitter-alt][twitter-img]](https://twitter.com/duongoku)
+  [![github-alt][github-img]](https://github.com/duongoku)
+
+ ### festusdrakon
+- Interested in figuring out how to turn Data into Information, primarily to improve customer experiences on the web.
+- Permission Marketing FTW! (Just **never** at the cost of privacy invasion.)
+- I share as I learn at [DIY DS](https://www.instagram.com/dodsyourself/) and [DIY CS](https://www.instagram.com/docsyourself/) on instagram.
+- Started from the bottom, now we here:
+  [![github-alt][github-img]](https://github.com/festusdrakon)
+
 ### Anastasis Xouzafeiris (aka anksos)
 - I am a VMware engineer
 - I'm currently working as a Virtualization Specialist
@@ -217,7 +280,7 @@ Start adding your names here:
 - I love Python :heart:
 - Connect with me on social media platform
 - [![twitter-alt][twitter-img]](https://twitter.com/rowhitswami)
-  [![facebook-alt][facebook-img]](https://facebook.com/rowhitswami)		
+  [![facebook-alt][facebook-img]](https://facebook.com/rowhitswami)
   [![github-alt][github-img]](https://github.com/rowhitswami)
 
 ### Shubham Nishad
@@ -280,7 +343,7 @@ Start adding your names here:
 - Computer science student
 - Nerd, geek, gamer, I love TLoK
 - [![github-alt][github-img]](https://github.com/frannievas)
-  
+
 ### Naufal Yudhistira
 - Ordinary student.
 - Like to play with cats.
@@ -416,6 +479,13 @@ Start adding your names here:
 - Engineer at heart, if it isn't broken, break it!
 - [![github-alt][github-img]](https://github.com/slouchd)
 
+### Ravi Thella
+- React Developer
+- Hobbies:
+  - Programming
+  - Watching Tennis
+- [![github-alt][github-img]](https://github.com/ravikishorethella)
+
 ### Example Profile
 - I'm an example that you can copy, if you want :)
 - I work for...
@@ -426,7 +496,7 @@ Start adding your names here:
   [![tumblr-alt][tumblr-img]](https://example.tumblr.com)
   [![dribbble-alt][dribbble-img]](https://dribbble.com/example)
   [![github-alt][github-img]](https://github.com/example)
-  
+
 
 ## How to Contribute
 
diff --git a/code/simcache.pl b/code/simcache.pl
new file mode 100644
index 0000000..f9ea20f
--- /dev/null
+++ b/code/simcache.pl
@@ -0,0 +1,84 @@
+#!/usr/bin/perl -w
+use strict;
+use warnings;
+ 
+############################################################
+### Usage: simcache.pl n_blocks n_blocksPerSet(associativity) n_wordsPerBlock TracerFile
+### ex : simcache.pl 128 1 4 trace1.txt
+### output: n_access n_missRate n_substitutions
+### ex : 300 20 35
+###
+### Celso A. Uliana Junior - Aug 2016
+############################################################
+ 
+die "Usage: simcache.pl n_blocks n_blocksPerSet(associativity) n_wordsPerBlock TracerFile\n " if ( @ARGV != 4 );
+ 
+ 
+my $n_set = ( my $blocks = shift) / ( my $assoc = shift); 
+my $n_words = shift; 
+my $tracerfile = shift;
+my %cs;
+my $i = 0, my $j = 0;
+my $n_access, my $n_miss, my $n_substitutions, my $n_missRate;
+my $n_log_words = log($n_words)/log(2); 
+ 
+############################################################
+# If tracerfile is not .txt adds .txt to the string
+############################################################
+ 
+if($tracerfile !~ /^\w+\.(doc|txt)$/){
+    $tracerfile = $tracerfile . ".txt";
+}
+ 
+############################################################
+# Reading tracer file
+############################################################
+ 
+open TRC , "$tracerfile" or die "Couldn't open the file $tracerfile\n" ;
+ 
+ 
+ 
+my $test = 0 ;
+my $test2 = 0 ;
+my $test3 = 0 ;
+ 
+my $hit = 0 ;
+while( <TRC> ){
+    chomp ;
+    if( $n_set == $blocks ){
+        if( $cs{int(($_ / 4) % $n_set)}[0] ){   
+                $test = int(($_ / 4) % $n_set);
+                $test2 = int( ($_ / 4) / $n_set );
+                $test3 = $cs{int(($_ / 4) % $n_set)}[2] ;
+                print "indice = $test // tag esperada = $test2 // tag no hash = $test3 \n";
+            if( $cs{int(($_ / 4) % $n_set)}[2] != int( ($_ / 4) / $n_set ) ){
+                $n_miss++; 
+                $n_substitutions++; 
+                $cs{(int($_ / 4) % $n_set)}[2] = int( ($_ / 4) / $n_set );
+            }
+            else{
+                $hit++;
+            }
+        }
+        else{
+            $cs{int(($_ / 4) % $n_set)}[0] = 1;
+            $n_miss++ ;
+            $cs{int(($_ / 4) % $n_set)}[2] = int( ($_ / 4) / $n_set);
+             
+        }
+    }
+
+    $n_access++; 
+}
+ 
+print "hits = $hit // misses = $n_miss\n"; 
+close TRC;
+
+############################################################
+# Print the n_acess n_missrate n_substitutions
+############################################################
+ 
+printf  ("%d %d %d \n", $n_access, (($n_miss / $n_access) * 100), $n_substitutions);   
+ 
+exit(0);
+############################################################
\ No newline at end of file