diff --git a/docs/grand-prix-go-curriculum.md b/docs/grand-prix-go-curriculum.md
new file mode 100644
index 000000000..98783e5f0
--- /dev/null
+++ b/docs/grand-prix-go-curriculum.md
@@ -0,0 +1,330 @@
+# Grand Prix Go curriculum
+
+---
+
+## Week One (Lundi 02/12/19 au DImanche 08/12/19)
+
+### Sprint 1
+
+#### Introduction to shell
+
+Notions: basic usage and interaction with a command line terminal.
+
+Videos:
+
+-   1-2 `curl` with the GitHub api and Example of shell file | https://www.youtube.com/watch?v=A0Mqc215igw
+-   1-3 `touch`, `chmod` and `echo` | https://www.youtube.com/watch?v=21h-vsuXgDU
+-   1-4 `find` and `grep` | https://www.youtube.com/watch?v=7a1JSWHhJlM
+-   1-5 `cut`, `sed` and `tr` | https://www.youtube.com/watch?v=Nil7rVP3eMI
+-   1-6 `jq` and `wc` | https://www.youtube.com/watch?v=cQmcaOseuiA&
+
+Exercices:
+
+-   introduction | https://public.01-edu.org/subjects/introduction.en
+-   make-it-better | https://public.01-edu.org/subjects/make-it-better.en
+-   to-git-or-not-to-git | https://public.01-edu.org/subjects/to-git-or-not-to-git.en
+-   who-are-you | https://public.01-edu.org/subjects/who-are-you.en
+-   cl-camp1 | https://public.01-edu.org/subjects/cl-camp1.en
+-   cl-camp2 | https://public.01-edu.org/subjects/cl-camp2.en
+-   cl-camp3 | https://public.01-edu.org/subjects/cl-camp3.en
+-   cl-camp4 | https://public.01-edu.org/subjects/cl-camp4.en
+-   cl-camp5 | https://public.01-edu.org/subjects/cl-camp5.en
+-   cl-camp6 | https://public.01-edu.org/subjects/cl-camp6.en
+-   cl-camp7 | https://public.01-edu.org/subjects/cl-camp7.en
+-   cl-camp8 | https://public.01-edu.org/subjects/cl-camp8.en
+-   now-get-to-work | https://public.01-edu.org/subjects/now-get-to-work.en
+
+### Sprint 2
+
+#### Introduction to Go Lang and basic programmation concepts
+
+Notions: Variables declaration, Loops, if and else statement, usage of z01.PrintRune function.
+
+Videos:
+
+-   02-01-If and Else Statements in Go | https://www.youtube.com/watch?v=rnF1_SfeGE4
+-   02-02-ForLoops | https://www.youtube.com/watch?v=Bt47lx6q2-4
+-   02-03-PrintRune function | https://www.youtube.com/watch?v=o8JrvI3jqoM
+-   02-04-Variables Declaration and ascii | https://www.youtube.com/watch?v=RCNOV8m0hJQ
+
+Exercices:
+
+-   printalphabet | https://public.01-edu.org/subjects/printalphabet.en
+-   printreversealphabet | https://public.01-edu.org/subjects/printreversealphabet.en
+-   prindigits | https://public.01-edu.org/subjects/printdigits.en
+-   isnegative | https://public.01-edu.org/subjects/isnegative.en
+-   printcomb | https://public.01-edu.org/subjects/printcomb.en
+-   printcomb2 | https://public.01-edu.org/subjects/printcomb2.en
+-   printnbr | https://public.01-edu.org/subjects/printnbr.en
+-   printcombn | https://public.01-edu.org/subjects/printcombn.en
+
+### Sprint 3
+
+#### Introduction to Go Lang and basic programmation concepts II
+
+Notions: String Manupulation, Range Loops, Pointers, Modulo and Division relative to computer science.
+
+Videos:
+
+-   03-01-StringsManipulation | https://www.youtube.com/watch?v=8LplJN_8iOU
+-   03-02-RangeLoop | https://www.youtube.com/watch?v=i89N4cjh1-g
+-   03-03-Pointers on variables | https://www.youtube.com/watch?v=owVPa5b1BMc
+-   03-04-Modulo and Division | https://www.youtube.com/watch?v=NVan-9-Ioec
+
+Exercices:
+
+-   pointone | https://public.01-edu.org/subjects/pointone.en
+-   ultimatepointone | https://public.01-edu.org/subjects/ultimatepointone.en
+-   divmod | https://public.01-edu.org/subjects/divmod.en
+-   ultimatedivmod | https://public.01-edu.org/subjects/ultimatedivmod.en
+-   printstr | https://public.01-edu.org/subjects/printstr.en
+-   strlen | https://public.01-edu.org/subjects/strlen.en
+-   swap | https://public.01-edu.org/subjects/swap.en
+-   strrev | https://public.01-edu.org/subjects/strrev.en
+-   basicatoi | https://public.01-edu.org/subjects/basicatoi.en
+-   basicatoi2 | https://public.01-edu.org/subjects/basicatoi2.en
+-   atoi | https://public.01-edu.org/subjects/atoi.en
+-   sortintegerable | https://public.01-edu.org/subjects/sortintegertable.en
+
+### Checkpoint 1 (4hours)
+
+#### Basic functions and programs skills evaluation, based on Sprint 2 and Sprint 3
+
+### CLM (Contre La Montre) 1 - Rectangle Drawing
+
+#### First Group project. Problem resolution. Usage of first knowledge (loop and if/else)
+
+---
+
+## Week Two (Lundi 09/12/2019 à Dimanche 15/12/2019)
+
+### Sprint 4
+
+#### Algorithmia concepts
+
+Notions: Iterative and recursive programmation
+
+Videos:
+
+-   04-01-Iterativity and Recursivity | https://www.youtube.com/watch?v=oCZDdAID5Ik
+
+Exercices:
+
+-   iterativefactorial | https://public.01-edu.org/subjects/iterativefactorial.en
+-   recursivefactorial | https://public.01-edu.org/subjects/recursivefactorial.en
+-   iterativepower | https://public.01-edu.org/subjects/iterativepower.en
+-   recursivepower | https://public.01-edu.org/subjects/recursivepower.en
+-   fibonacci | https://public.01-edu.org/subjects/fibonacci.en
+-   sqrt | https://public.01-edu.org/subjects/sqrt.en
+-   isprime | https://public.01-edu.org/subjects/isprime.en
+-   findnextprime | https://public.01-edu.org/subjects/findnextprime.en
+-   eightqueens | https://public.01-edu.org/subjects/eightqueens.en
+
+### Sprint 5
+
+#### Application of previously viewed concepts.
+
+Notions: String Manipulation and medium-advanced algorithmia
+
+Videos:
+
+-   05-01-Runes, Bytes and Strings | https://www.youtube.com/watch?v=-eIU5ISID64
+
+Exercices:
+
+-   firstrune | https://public.01-edu.org/subjects/firstrune.en
+-   nrune | https://public.01-edu.org/subjects/nrune.en
+-   lastrune | https://public.01-edu.org/subjects/lastrune.en
+-   index | https://public.01-edu.org/subjects/index.en
+-   compare | https://public.01-edu.org/subjects/compare.en
+-   toupper | https://public.01-edu.org/subjects/toupper.en
+-   tolower | https://public.01-edu.org/subjects/tolower.en
+-   capitalize | https://public.01-edu.org/subjects/capitalize.en
+-   isalpha | https://public.01-edu.org/subjects/isalpha.en
+-   isnumeric | https://public.01-edu.org/subjects/isnumeric.en
+-   islower | https://public.01-edu.org/subjects/islower.en
+-   isupper | https://public.01-edu.org/subjects/isupper.en
+-   isprintable | https://public.01-edu.org/subjects/isprintable.en
+-   concat | https://public.01-edu.org/subjects/concat.en
+-   basicjoin | https://public.01-edu.org/subjects/basicjoin.en
+-   join | https://public.01-edu.org/subjects/join.en
+-   printnbrbase | https://public.01-edu.org/subjects/printnbrbase.en
+-   atoibase | https://public.01-edu.org/subjects/atoibase.en
+
+### Sprint 6
+
+#### Usage of OS.Args
+
+Notions: Arguments manipulation in programs
+
+Videos:
+
+-   06-01-Os.Args | https://www.youtube.com/watch?v=I1xt_TLRhF0
+
+Exercices:
+
+-   printprogramname | https://public.01-edu.org/subjects/printprogramname.en
+-   printparams | https://public.01-edu.org/subjects/printparams.en
+-   revparams | https://public.01-edu.org/subjects/revparams.en
+-   sortparams | https://public.01-edu.org/subjects/sortparams.en
+
+### Sprint 7
+
+#### The Memory Allocation in GoLang
+
+Notions: Usage of Make and Append
+
+Videos:
+
+-   07-01-Make and Append methods | https://www.youtube.com/watch?v=2HHVUM0YQuI
+
+Exercices:
+
+-   appendrange | https://public.01-edu.org/subjects/apprendrange.en
+-   makerange | https://public.01-edu.org/subjects/makerange.en
+-   concatparams | https://public.01-edu.org/subjects/concatparams.en
+-   splitwhitespaces | https://public.01-edu.org/subjects/splitwhitespaces.en
+-   printwordstables | https://public.01-edu.org/subjects/printwordstables.en
+-   convertbase | https://public.01-edu.org/subjects/converbase.en
+-   split | https://public.01-edu.org/subjects/split.en
+
+### Checkpoint 2 (4hours)
+
+#### Basic functions and programs skills evaluation, based on Sprint 2 and Sprint 6
+
+### CLM (Contre La Montre) 2 - Sudoku
+
+#### Second Group project. Problem resolution. Usage of Memory manipulation tools
+
+---
+
+## Week Three + Holiday project (Lundi 16/12/2019 à dimache 05/01/2020 )
+
+### Sprint 8
+
+#### Introduction to Structures and advanced types in GoLang
+
+Notions: Creation of struct types and file manipulation (Open, Read, Close methods)
+
+Videos:
+
+-   08-01-Structures in Go | https://www.youtube.com/watch?v=-24M7r7VuLY
+-   08-02-File Manipulation in go | https://www.youtube.com/watch?v=8vUgchQGhcQ
+
+Exercices:
+
+-   bool | https://public.01-edu.org/subjects/bool.en
+-   point | https://public.01-edu.org/subjects/point.en
+-   displayfile | https://public.01-edu.org/subjects/displayfile.en
+-   cat | https://public.01-edu.org/subjects/cat.en
+-   ztail | https://public.01-edu.org/subjects/ztail.en
+
+### Sprint 9
+
+#### Functions as argument
+
+Notions: Advance function prototyping
+
+Videos:
+
+-   09-01-Functions as Arguments | https://www.youtube.com/watch?v=lw8jUwsluAE
+
+Exercices:
+
+-   foreach | https://public.01-edu.org/subjects/foreach.en
+-   map | https://public.01-edu.org/subjects/map.en
+-   any | https://public.01-edu.org/subjects/any.en
+-   countif | https://public.01-edu.org/subjects/countif.en
+-   issorted | https://public.01-edu.org/subjects/issorted.en
+-   doop | https://public.01-edu.org/subjects/doop.en
+-   sortwordarr | https://public.01-edu.org/subjects/sortwordarr.en
+-   advancedsortwordarr | https://public.01-edu.org/subjects/advancedsortwordarr.en
+
+### Sprint 10
+
+#### Hackathon
+
+Notions: All previously viewed concepts in team work
+
+Exercices:
+
+-   rot14 | https://public.01-edu.org/subjects/rot14.en
+-   abort | https://public.01-edu.org/subjects/abort.en
+-   collatzcountdown | https://public.01-edu.org/subjects/collatzcountdown.en
+-   comcheck | https://public.01-edu.org/subjects/comcheck.en
+-   enigma | https://public.01-edu.org/subjects/enigma.en
+-   pilot | https://public.01-edu.org/subjects/pilot.en
+-   fixthemain | https://public.01-edu.org/subjects/fixthemain.en
+-   compact | https://public.01-edu.org/subjects/compact.en
+-   activebits | https://public.01-edu.org/subjects/activebits.en
+-   max | https://public.01-edu.org/subjects/max.en
+-   join | https://public.01-edu.org/subjects/join.en
+-   unmatch | https://public.01-edu.org/subjects/unmatch.en
+
+### Checkpoint 3 (4hours)
+
+#### Basic functions and programs skills evaluation, based on Sprint 2 and Sprint 8
+
+### CLM (Contre La Montre) 3 - File Reader ( Projet pour les 2 semaines de vacances)
+
+#### Second Group project. Problem resolution. File manipulation based on CLM (Contre La Montre) 1
+
+---
+
+## Week Four (lundi 06/01/2020 à vendredi 10/01/2020)
+
+### Sprint 11
+
+#### Linked lists in GoLang
+
+Notions: Pointers manipulation and data structure
+
+Videos:
+
+-   11-01-Linked Lists Introduction | https://www.youtube.com/watch?v=EPICVEbylU0
+
+Exercices:
+
+-   listpushback | https://public.01-edu.org/subjects/listpushback.en
+-   listpushfront | https://public.01-edu.org/subjects/listpushfront.en
+-   listsize | https://public.01-edu.org/subjects/listsize.en
+-   listlast | https://public.01-edu.org/subjects/listlast.en
+-   listclear | https://public.01-edu.org/subjects/listclear.en
+-   listat | https://public.01-edu.org/subjects/listat.en
+-   listreverse | https://public.01-edu.org/subjects/listreverse.en
+-   listforeach | https://public.01-edu.org/subjects/listforeach.en
+-   listforeachif | https://public.01-edu.org/subjects/listforeachif.en
+-   listfind | https://public.01-edu.org/subjects/listfind.en
+-   listremoveif | https://public.01-edu.org/subjects/listremoveif.en
+-   listmerge | https://public.01-edu.org/subjects/listmerge.en
+-   listsort | https://public.01-edu.org/subjects/listsort.en
+-   sortlistinsert | https://public.01-edu.org/subjects/sortlistinsert.en
+-   sortedlistmerge | https://public.01-edu.org/subjects/sortedlistmerge.en
+
+### Sprint 12
+
+#### Binary Trees
+
+Notions: Advanced Data Structure using binary trees
+
+Videos:
+
+-   12-01-Introduction to Binary Trees | https://www.youtube.com/watch?v=3g2WCqWNIVs
+
+Exercices:
+
+-   btreeinsertdata | https://public.01-edu.org/subjects/btreeinsertdata.en
+-   btreeapplyinorder | https://public.01-edu.org/subjects/btreeapplyinorder.en
+-   btreeapplypreorder | https://public.01-edu.org/subjects/btreeapplypreorder.en
+-   btreesearchitem | https://public.01-edu.org/subjects/btreesearchitem.en
+-   btreelevelcount | https://public.01-edu.org/subjects/btreelevelcount.en
+-   btreeisbinary | https://public.01-edu.org/subjects/btreeisbinary.en
+-   btreeapplylevel | https://public.01-edu.org/subjects/btreeapplylevel.en
+-   btreemax | https://public.01-edu.org/subjects/btreemax.en
+-   btreemin | https://public.01-edu.org/subjects/btreemin.en
+-   btreetransplant | https://public.01-edu.org/subjects/btreetransplant.en
+-   btreedeletenode | https://public.01-edu.org/subjects/btreedeletenode.en
+
+### Checkpoint 4 - Final Checkpoint (8hours)
+
+#### Functions and programs skills evaluation, based on Sprint 2 and Sprint 11
diff --git a/docs/server-installation.md b/docs/server-installation.md
new file mode 100644
index 000000000..089c00ee8
--- /dev/null
+++ b/docs/server-installation.md
@@ -0,0 +1,47 @@
+# Server installation
+
+## DNS configuration
+
+One domain and one subdomain must point to the IP address of a [dedicated server](server-requirements.md).
+
+| FQDN           | Record type | Address |
+| -------------- | ----------- | ------- |
+| {{DOMAIN}}     | A           | X.X.X.X |
+| git.{{DOMAIN}} | A           | X.X.X.X |
+
+## Network configuration
+
+### Inbound
+
+| Port | Transport | Application      |
+| ---- | --------- | ---------------- |
+| 22   | TCP       | SSH              |
+| 80   | TCP, UDP  | HTTP/(1.1, 2, 3) |
+| 443  | TCP, UDP  | HTTP/(1.1, 2, 3) |
+| 521  | TCP       | SSH              |
+
+### Outbound
+
+| Port | Transport | Application |
+| ---- | --------- | ----------- |
+| 465  | TCP       | SMTP        |
+
+### OS installation
+
+Download and boot the ISO image `amd64` of [Debian](https://www.debian.org/distrib/netinst)
+
+Select :
+
+-   "Advanced options ..."
+-   "... Automated install"
+
+The network is automatically configured with DHCP, you can also configure it manually.
+
+At the prompt "Location of initial preconfiguration file:", enter the url :
+
+```
+raw.githubusercontent.com/01-edu/public/master/scripts/preseed.cfg
+```
+
+and select "Continue", let us know when the server's remote access is ready, we will configure it.
+
diff --git a/scripts/preseed.cfg b/scripts/preseed.cfg
index 5fdd31b57..76d563394 100644
--- a/scripts/preseed.cfg
+++ b/scripts/preseed.cfg
@@ -14,8 +14,8 @@ d-i mirror/http/hostname string deb.debian.org
 d-i mirror/http/directory string /debian
 d-i mirror/http/proxy string
 
-#d-i netcfg/choose_interface select auto
-#d-i netcfg/get_hostname string debian
-#d-i netcfg/get_domain string local
+# d-i netcfg/choose_interface select auto
+# d-i netcfg/get_hostname string debian
+# d-i netcfg/get_domain string local
 
 d-i hw-detect/load_firmware boolean true
diff --git a/subjects/atoiprog.en.md b/subjects/atoiprog.en.md
index a786abfb1..221178409 100644
--- a/subjects/atoiprog.en.md
+++ b/subjects/atoiprog.en.md
@@ -1,6 +1,6 @@
 ## atoiprog
 
-##**WARNING! VERY IMPORTANT!**
+## **WARNING! VERY IMPORTANT!**
 
 For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
 
diff --git a/subjects/cat.en.md b/subjects/cat.en.md
index 67232219f..8e5875d36 100644
--- a/subjects/cat.en.md
+++ b/subjects/cat.en.md
@@ -24,13 +24,15 @@ Write a program that has the same behaviour as the system's `cat` command-line.
 
 ```console
 student@ubuntu:~/piscine-go/cat$ go build
-student@ubuntu:~/piscine-go/cat$ ./cat
-Hello
-Hello
+student@ubuntu:~/piscine-go/cat$ ./cat abc
+open abc: no such file or directory
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt
 "Programming is a skill best acquired by pratice and example rather than from books" by Alan Turing
+student@ubuntu:~/piscine-go/cat$ ./cat
+Hello
+Hello^C
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt quest8T.txt
 "Programming is a skill best acquired by pratice and example rather than from books" by Alan Turing
-
 "Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. Turing is widely considered to be the father of theoretical computer science and artificial intelligence."
+student@ubuntu:~/piscine-go/cat$
 ```
diff --git a/subjects/cat.fr.md b/subjects/cat.fr.md
index 1ba449896..1d6774358 100644
--- a/subjects/cat.fr.md
+++ b/subjects/cat.fr.md
@@ -18,17 +18,15 @@
 
 `"Alan Mathison Turing was an English mathematician, computer scientist, logician, cryptanalyst. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. Turing is widely considered to be the father of theoretical computer science and artificial intelligence."`
 
--   En cas d'erreur le programme doit imprimer l'erreur.
-
 -   L eprogramme doit être rendu dans un dossier nommé `cat`.
 
 ### Utilisation:
 
 ```console
 student@ubuntu:~/piscine-go/cat$ go build
-student@ubuntu:~/piscine-go/cat$ ./cat
-Hello
+student@ubuntu:~/piscine-go/cat$ ./cat Hello There
 Hello
+There
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt
 "Programming is a skill best acquired by pratice and example rather than from books" by Alan Turing
 student@ubuntu:~/piscine-go/cat$ ./cat quest8.txt quest8T.txt
diff --git a/subjects/cl-camp3.en.md b/subjects/cl-camp3.en.md
index e10fd90db..5372dcba5 100644
--- a/subjects/cl-camp3.en.md
+++ b/subjects/cl-camp3.en.md
@@ -6,8 +6,8 @@
 
 Create a file `look`, which will look for and show, in the current directory and its sub-folders all the files :
 
--   starting with an `a` and,
--   all the files ending with a `z` and,
+-   starting with an `a` or,
+-   all the files ending with a `z` or,
 -   all files starting with `z` and ending with `a!`.
 
 ### Hint
diff --git a/subjects/convertbase.en.md b/subjects/convertbase.en.md
index 9c4f1e592..ba136e610 100644
--- a/subjects/convertbase.en.md
+++ b/subjects/convertbase.en.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Write a function that returns the convertion of a `string` number from one `string` baseFrom to one `string` baseTo.
+Write a function that returns the conversion of a `string` number from one `string` baseFrom to one `string` baseTo.
 
 Only valid bases will be tested.
 
diff --git a/subjects/disclaimer.en.md b/subjects/disclaimer.en.md
index 29b469c63..31b6bacc1 100644
--- a/subjects/disclaimer.en.md
+++ b/subjects/disclaimer.en.md
@@ -1,4 +1,4 @@
-##**WARNING! VERY IMPORTANT!**
+## **WARNING! VERY IMPORTANT!**
 
 For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
 
diff --git a/subjects/disclaimer.fr.md b/subjects/disclaimer.fr.md
index 85f821d63..ed4eaf663 100644
--- a/subjects/disclaimer.fr.md
+++ b/subjects/disclaimer.fr.md
@@ -1,4 +1,4 @@
-##**AVERTISSEMENT! TRÈS IMPORTANT!**
+## **AVERTISSEMENT! TRÈS IMPORTANT!**
 
 Pour cet exercice une fonction sera testée **avec le main de l'examen**. Cependant l'étudiant **doit quand même** rendre un programme structuré:
 
diff --git a/subjects/doop.en.md b/subjects/doop.en.md
index fd67dc190..3a1331854 100644
--- a/subjects/doop.en.md
+++ b/subjects/doop.en.md
@@ -10,10 +10,16 @@ The program has to be used with three arguments:
 - An operator
 - Another value
 
+You should use `int64`.
+
+The following operators are considered valid: `+`, `-`, `/`, `*`, `%`.
+
 In case of an invalid operator the programs prints `0`.
 
 In case of an invalid number of arguments the program prints nothing.
 
+In case of overflow the program prints `Overflow`.
+
 The program has to handle the modulo and division operations by 0 as shown on the output examples below.
 
 `fmt.Print` is authorized.
@@ -33,6 +39,12 @@ student@ubuntu:~/piscine-go/test$ ./doop 1 / 0 | cat -e
 No division by 0$
 student@ubuntu:~/piscine-go/test$ ./doop 1 % 0 | cat -e
 No Modulo by 0$
+student@ubuntu:~/piscine-go/test$ ./doop 9223372036854775807 + 1
+Overflow
+student@ubuntu:~/piscine-go/test$ ./doop -9223372036854775809 "*" 3
+Overflow
+student@ubuntu:~/piscine-go/test$ ./doop 9223372036854775807 "*" 3
+Overflow
 student@ubuntu:~/piscine-go/test$ ./doop 1 "*" 1
 1
 student@ubuntu:~/piscine-go/test$ ./doop 1 "*" -1
diff --git a/subjects/eightqueens.en.md b/subjects/eightqueens.en.md
index bad19e06a..9ea155188 100644
--- a/subjects/eightqueens.en.md
+++ b/subjects/eightqueens.en.md
@@ -25,7 +25,7 @@ The solutions will be printed in ascending order.
 ### Expected function
 
 ```go
-package main
+package piscine
 
 func EightQueens() {
 
diff --git a/subjects/explain.en.md b/subjects/explain.en.md
index a3962cf5f..9d130b1ab 100644
--- a/subjects/explain.en.md
+++ b/subjects/explain.en.md
@@ -13,7 +13,7 @@ Write an `explain.sh` file that:
 - displays the first and last name of your key witness
 - displays the interview number of this witness
 - displays the colour and the make of the car of the suspects
-- displays the names of the 3 other main suspects that were not arrested (in the order that they should have appeared during the investigation)
+- displays the names of the 3 other main suspects that were not arrested (in alphabetical order of their last name)
 
 ### Usage
 
diff --git a/subjects/firstruneprog.en.md b/subjects/firstruneprog.en.md
index c747c00be..7e9fa6792 100644
--- a/subjects/firstruneprog.en.md
+++ b/subjects/firstruneprog.en.md
@@ -1,8 +1,8 @@
 ## firstruneprog
 
-## **WARNING! VERY IMPORTANT!**
-
-For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
+> ### **WARNING! VERY IMPORTANT!**
+>
+> For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program
 
 This means that:
 
diff --git a/subjects/fprime.en.md b/subjects/fprime.en.md
index 0c4ad4baf..c33dd89b1 100644
--- a/subjects/fprime.en.md
+++ b/subjects/fprime.en.md
@@ -10,8 +10,6 @@ Write a program that takes a positive `int` and displays its prime factors, foll
 
 -   The input, when there is one, will always be valid.
 
--   In this exercise the primes factor of 1 is considered as 1.
-
 ### Usage
 
 ```console
@@ -31,6 +29,6 @@ student@ubuntu:~/piscine-go/test$ ./test a
 student@ubuntu:~/piscine-go/test$ ./test 0
 
 student@ubuntu:~/piscine-go/test$ ./test 1
-1
+
 student@ubuntu:~/piscine-go/test$
 ```
diff --git a/subjects/fprime.fr.md b/subjects/fprime.fr.md
index 3aa55c3d0..b0602105f 100644
--- a/subjects/fprime.fr.md
+++ b/subjects/fprime.fr.md
@@ -28,5 +28,7 @@ student@ubuntu:~/piscine-go/test$ ./test a
 
 student@ubuntu:~/piscine-go/test$ ./test 0
 
+student@ubuntu:~/piscine-go/test$ ./test 1
+
 student@ubuntu:~/piscine-go/test$
 ```
diff --git a/subjects/introduction.en.md b/subjects/introduction.en.md
index c1f9074d6..ffe99fdbc 100644
--- a/subjects/introduction.en.md
+++ b/subjects/introduction.en.md
@@ -12,7 +12,7 @@ Once created, clone that repository on your desktop.
 
 If your username was `choumi` this is the command that will need to be used :
 
-`git clone git@git.alem.school:choumi/piscine-go.git`
+`git clone git@git.01.alem.school:choumi/piscine-go.git`
 
 This command needs to be adapted with **your own username**.
 
diff --git a/subjects/isalpha.en.md b/subjects/isalpha.en.md
index 298a9f020..09b52f81d 100644
--- a/subjects/isalpha.en.md
+++ b/subjects/isalpha.en.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Write a function that returns `true` if the `string` passed in parameter only contains alphanumerical characters, and that returns `false` otherwise.
+Write a function that returns `true` if the `string` passed in parameter only contains alphanumerical characters or is empty, and that returns `false` otherwise.
 
 ### Expected function
 
diff --git a/subjects/itoabase.en.md b/subjects/itoabase.en.md
index ec8d29fd6..33338b168 100644
--- a/subjects/itoabase.en.md
+++ b/subjects/itoabase.en.md
@@ -1,16 +1,5 @@
 ## itoabase
 
-## **WARNING! VERY IMPORTANT!**
-
-For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
-
-This means that:
-
-- The package needs to be named `package main`.
-- The submitted code needs one declared function main(```func main()```) even if empty.
-- The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
-- Every other rules are obviously the same than for a `program`.
-
 ### Instructions
 
 Write a function that:
diff --git a/subjects/printnbrbase.en.md b/subjects/printnbrbase.en.md
index 15880adc4..226c1ba22 100644
--- a/subjects/printnbrbase.en.md
+++ b/subjects/printnbrbase.en.md
@@ -17,7 +17,7 @@ The function has to manage negative numbers. (as shown in the example)
 ### Expected function
 
 ```go
-func PrintNbrBase(nbr int, base string) () {
+func PrintNbrBase(nbr int, base string) {
 
 }
 ```
diff --git a/subjects/printnbrbase.fr.md b/subjects/printnbrbase.fr.md
index af3ee3a41..4031792bc 100644
--- a/subjects/printnbrbase.fr.md
+++ b/subjects/printnbrbase.fr.md
@@ -17,7 +17,7 @@ La fonction doit gérer les nombres négatifs (comme montré sur l'exemple).
 ### Fonction attendue
 
 ```go
-func PrintNbrBase(nbr int, base string) () {
+func PrintNbrBase(nbr int, base string) {
 
 }
 ```
diff --git a/subjects/printparams.en.md b/subjects/printparams.en.md
index c521b866c..b11a9357e 100644
--- a/subjects/printparams.en.md
+++ b/subjects/printparams.en.md
@@ -7,12 +7,12 @@ Write a **program** that prints the arguments received in the command line.
 Example of output :
 
 ```console
-student@ubuntu:~/piscine-go/test$ go build
-student@ubuntu:~/piscine-go/test$ ./printparams choumi is the best cat
+student@ubuntu:~/piscine-go/printparams$ go build
+student@ubuntu:~/piscine-go/printparams$ ./printparams choumi is the best cat
 choumi
 is
 the
 best
 cat
-student@ubuntu:~/piscine-go/test$
+student@ubuntu:~/piscine-go/printparams$
 ```
diff --git a/subjects/printparams.fr.md b/subjects/printparams.fr.md
index e2b50f961..fba7e7dd8 100644
--- a/subjects/printparams.fr.md
+++ b/subjects/printparams.fr.md
@@ -7,12 +7,12 @@
 Exemple de résultat :
 
 ```console
-student@ubuntu:~/piscine-go/test$ go build
-student@ubuntu:~/piscine-go/test$ ./printparams choumi is the best cat
+student@ubuntu:~/piscine-go/printparams$ go build
+student@ubuntu:~/piscine-go/printparams$ ./printparams choumi is the best cat
 choumi
 is
 the
 best
 cat
-student@ubuntu:~/piscine-go/test$
+student@ubuntu:~/piscine-go/printparams$
 ```
diff --git a/subjects/raid1a.en.md b/subjects/raid1a.en.md
index 76e234420..1daad823e 100644
--- a/subjects/raid1a.en.md
+++ b/subjects/raid1a.en.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a function `Raid1a` that prints a **valid** square of width `x` and of height `y`.
+Write a function `Raid1a` that prints a **valid** rectangle of width `x` and of height `y`.
 
-The function must draw the squares as in the examples.
+The function must draw the rectangles as in the examples.
 
 ### Expected function
 
@@ -24,7 +24,6 @@ Program #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Program #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Program #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Program #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1a.fr.md b/subjects/raid1a.fr.md
index 877c76d2a..66d64b9bc 100644
--- a/subjects/raid1a.fr.md
+++ b/subjects/raid1a.fr.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Écrire une fonction `Raid1a` qui affiche un carré **valide** de largeur `x` et de hauteur `y`.
+Écrire une fonction `Raid1a` qui affiche un rectangle **valide** de largeur `x` et de hauteur `y`.
 
-Cette fonction doit dessiner les carrés comme sur les examples.
+Cette fonction doit dessiner les rectangles comme sur les examples.
 
 ### Fonction attendue
 
@@ -24,7 +24,6 @@ Programme #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Programme #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Programme #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Programme #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1b.en.md b/subjects/raid1b.en.md
index f096ab6c4..8e304afe5 100644
--- a/subjects/raid1b.en.md
+++ b/subjects/raid1b.en.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a function `Raid1b` that prints a **valid** square of width `x` and of height `y`.
+Write a function `Raid1b` that prints a **valid** rectangle of width `x` and of height `y`.
 
-The function must draw the squares as in the examples.
+The function must draw the rectangles as in the examples.
 
 ### Expected function
 
@@ -24,7 +24,6 @@ Program #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Program #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Program #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Program #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1b.fr.md b/subjects/raid1b.fr.md
index 1289e39be..d2dc34f82 100644
--- a/subjects/raid1b.fr.md
+++ b/subjects/raid1b.fr.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Écrire une fonction `Raid1b` qui affiche un carré **valide** de largeur `x` et de hauteur `y`.
+Écrire une fonction `Raid1b` qui affiche un rectangle **valide** de largeur `x` et de hauteur `y`.
 
-Cette fonction doit dessiner les carrés comme sur les examples.
+Cette fonction doit dessiner les rectangles comme sur les examples.
 
 ### Fonction attendue
 
@@ -24,7 +24,6 @@ Programme #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Programme #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Programme #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Programme #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1c.en.md b/subjects/raid1c.en.md
index 003be5d65..5aaf8a1a6 100644
--- a/subjects/raid1c.en.md
+++ b/subjects/raid1c.en.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a function `Raid1c` that prints a **valid** square of width `x` and of height `y`.
+Write a function `Raid1c` that prints a **valid** rectangle of width `x` and of height `y`.
 
-The function must draw the squares as in the examples.
+The function must draw the rectangles as in the examples.
 
 ### Expected function
 
@@ -24,7 +24,6 @@ Program #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Program #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Program #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Program #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1c.fr.md b/subjects/raid1c.fr.md
index d064867a6..c6613aa5d 100644
--- a/subjects/raid1c.fr.md
+++ b/subjects/raid1c.fr.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Écrire une fonction `Raid1c` qui affiche un carré **valide** de largeur `x` et de hauteur `y`.
+Écrire une fonction `Raid1c` qui affiche un rectangle **valide** de largeur `x` et de hauteur `y`.
 
-Cette fonction doit dessiner les carrés comme sur les examples.
+Cette fonction doit dessiner les rectangles comme sur les examples.
 
 ### Fonction attendue
 
@@ -24,7 +24,6 @@ Programme #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Programme #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Programme #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Programme #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1d.en.md b/subjects/raid1d.en.md
index c1ae6d8d7..691d4010e 100644
--- a/subjects/raid1d.en.md
+++ b/subjects/raid1d.en.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a function `Raid1d` that prints a **valid** square of width `x` and of height `y`.
+Write a function `Raid1d` that prints a **valid** rectangle of width `x` and of height `y`.
 
-The function must draw the squares as in the examples.
+The function must draw the rectangles as in the examples.
 
 ### Expected function
 
@@ -24,7 +24,6 @@ Program #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Program #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Program #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Program #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1d.fr.md b/subjects/raid1d.fr.md
index 9cbdc161c..d889014ea 100644
--- a/subjects/raid1d.fr.md
+++ b/subjects/raid1d.fr.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Écrire une fonction `Raid1d` qui affiche un carré **valide** de largeur `x` et de hauteur `y`.
+Écrire une fonction `Raid1d` qui affiche un rectangle **valide** de largeur `x` et de hauteur `y`.
 
-Cette fonction doit dessiner les carrés comme sur les examples.
+Cette fonction doit dessiner les rectangles comme sur les examples.
 
 ### Fonction attendue
 
@@ -24,7 +24,6 @@ Programme #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Programme #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Programme #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Programme #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1e.en.md b/subjects/raid1e.en.md
index 94cbce370..055dcfa39 100644
--- a/subjects/raid1e.en.md
+++ b/subjects/raid1e.en.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a function `Raid1e` that prints a **valid** square of width `x` and of height `y`.
+Write a function `Raid1e` that prints a **valid** rectangle of width `x` and of height `y`.
 
-The function must draw the squares as in the examples.
+The function must draw the rectangles as in the examples.
 
 ### Expected function
 
@@ -24,7 +24,6 @@ Program #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Program #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Program #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Program #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/raid1e.fr.md b/subjects/raid1e.fr.md
index 4b7124a1e..acf2878f5 100644
--- a/subjects/raid1e.fr.md
+++ b/subjects/raid1e.fr.md
@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Écrire une fonction `Raid1e` qui affiche un carré **valide** de largeur `x` et de hauteur `y`.
+Écrire une fonction `Raid1e` qui affiche un rectangle **valide** de largeur `x` et de hauteur `y`.
 
-Cette fonction doit dessiner les carrés comme sur les examples.
+Cette fonction doit dessiner les rectangles comme sur les examples.
 
 ### Fonction attendue
 
@@ -24,7 +24,6 @@ Programme #1
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -50,7 +49,6 @@ Programme #2
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -74,7 +72,6 @@ Programme #3
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
@@ -98,7 +95,6 @@ Programme #4
 package main
 
 import (
-	"fmt"
 	student "./student"
 )
 
diff --git a/subjects/reversebits.en.md b/subjects/reversebits.en.md
index 7ed4ddadc..7ae7fd193 100644
--- a/subjects/reversebits.en.md
+++ b/subjects/reversebits.en.md
@@ -13,12 +13,12 @@ This means that:
 
 ### Instructions
 
-Write a function that takes a `byte`, reverses it, `bit` by `bit` (like the
-example) and returns the result.
+Write a function that takes a `byte`, reverses it `bit` by `bit` (as shown in the example) and returns the result.
 
 ### Expected function
 
 ```go
+
 func ReverseBits(oct byte) byte {
 
 }
diff --git a/subjects/reversebits.fr.md b/subjects/reversebits.fr.md
index 96e03ec8f..cd08a4502 100644
--- a/subjects/reversebits.fr.md
+++ b/subjects/reversebits.fr.md
@@ -21,6 +21,7 @@ Cela signifie que:
 func ReverseBits(oct byte) byte {
 
 }
+
 ```
 
 Exemple:
diff --git a/subjects/rot14.en.md b/subjects/rot14.en.md
index a31914774..3a3694441 100644
--- a/subjects/rot14.en.md
+++ b/subjects/rot14.en.md
@@ -2,9 +2,7 @@
 
 ### Instructions
 
-Write a function `rot14` that returns the `string` within the parameter transformed into a `rot14 string`.
-
--   There is the need to know what `rot13` stands for.
+Write a function `rot14` that returns the `string` within the parameter transformed into a `rot14 string`, that replaces a letter with the 14th letter after it, in the alphabet.
 
 ### Expected function
 
diff --git a/subjects/sortparams.en.md b/subjects/sortparams.en.md
index eb586885f..06dcf0078 100644
--- a/subjects/sortparams.en.md
+++ b/subjects/sortparams.en.md
@@ -7,8 +7,8 @@ Write a **program** that prints the arguments received in the command line in AS
 Example of output :
 
 ```console
-student@ubuntu:~/piscine-go/test$ go build
-student@ubuntu:~/piscine-go/test$ ./sortparams 1 a 2 A 3 b 4 C
+student@ubuntu:~/piscine-go/sortparams$ go build
+student@ubuntu:~/piscine-go/sortparams$ ./sortparams 1 a 2 A 3 b 4 C
 1
 2
 3
@@ -17,5 +17,5 @@ A
 C
 a
 b
-student@ubuntu:~/piscine-go/test$
+student@ubuntu:~/piscine-go/sortparams$
 ```
diff --git a/subjects/splitprog.fr.md b/subjects/splitprog.fr.md
index 195450470..c43f92248 100644
--- a/subjects/splitprog.fr.md
+++ b/subjects/splitprog.fr.md
@@ -1,5 +1,17 @@
 ## splitprog
 
+## **AVERTISSEMENT! TRÈS IMPORTANT!**
+
+Pour cet exercice une fonction sera testée **avec le main de l'examen**. Cependant l'étudiant **doit quand même** rendre un programme structuré:
+
+Cela signifie que:
+
+- Le package doit être nommé `package main`.
+- Le code rendu doit avoir une fonction main déclarée(```func main()```) même si elle est vide.
+- La fonction main déclarée doit **aussi passer** le `Restrictions Checker`(le testeur de fonctions illégales). Il est conseillé à l'étudiant de rendre une fonction main vide après ses tests finis.
+- Toutes les autres régles sont les mêmes que pour un `programme`.
+
+
 ### Instructions
 
 Écrire une fonction qui sépare les mots d'une `string`, qui les met dans un tableau de `string`.
@@ -32,6 +44,7 @@ func main() {
 }
 ```
 
+
 Et son résultat :
 
 ```console
diff --git a/subjects/unavailable.en.md b/subjects/unavailable.en.md
new file mode 100644
index 000000000..caef4db19
--- /dev/null
+++ b/subjects/unavailable.en.md
@@ -0,0 +1,3 @@
+# Unavailable
+
+This subject is currently unavailable for you.
diff --git a/subjects/unavailable.fr.md b/subjects/unavailable.fr.md
new file mode 100644
index 000000000..6be8cf6a6
--- /dev/null
+++ b/subjects/unavailable.fr.md
@@ -0,0 +1,3 @@
+# Indisponible
+
+Ce sujet est actuellement indisponible pour vous.