Unscramble the Source Code

Question

Note: This challenge is now closed to new cop submissions. This is to ensure that no one can post submissions that only remain uncracked because there aren't enough robbers interested in the challenge anymore.

In this game of cops-and-robbers, each cop will write a simple program to give a single output. They will then make public four things about their program:

1. The language
2. The program length
3. The desired output
4. A scrambled-up version of the source code

Then, the robbers must unscramble the source code so that their program functions like the original.

---

Cop Rules

You are to write a simple program, which the robbers will try to recreate.

Your original program must have a simple functionality: upon execution, it outputs a single string/number and halts. It should give the same output regardless of when/where it is run, and should not depend on extra libraries or the internet.

Your program and output must use printable ASCII (newlines and spaces allowed). The output should be no more than 100 characters long, and the program should take less than about 5 seconds to run on a reasonable machine. You are also not allowed to use hashing (or other cryptographic functions) in your program

Then, you provide a scrambled-up version of the source code and the required output. You can scramble up your source code however you may like, as long as characters are conserved.

Your score is the shortest program you have submitted which hasn't been cracked. After a period of one week, an uncracked submission will become immune. In order to claim this immunity, you should edit your answer to show the correct answer. (Clarification: Until you reveal the answer, you are not immune and can still be cracked.) The lowest score wins.

Simple Example Cop Answers

Perl, 20

ellir"lnto Wo d";prH

Hello World

Or...

Perl, 15

*3i)xp3rn3*x3t(

272727

Robber Rules

Robbers will post their cracking attempts as answers in a separate thread, located here.

You have one attempt at cracking each submission. Your cracking attempt will be an unscrambled version of the source code. If your guess matches the description (same characters, output, and of course language), and you are the first correct guess, then you win a point. It is important to note that your program does not have to exactly match the original, simply use the same characters and have the same functionality. This means there could be more than one correct answer.

The robber with the most points (successful cracks) wins.

Simple Example Robber Answers

Your program was print "Hello World";. (Although print"Hello World" ; could have also worked.)

Your program was print(3**3x3)x3

Safe Submissions

1. ASP/ASP.Net, 14 (Jamie Barker)
2. Befunge-98, 15 (FireFly)
3. GolfScript, 16 (Peter Taylor)
4. CJam, 19 (DLosc)
5. GolfScript, 20 (user23013)
6. Perl, 21 (primo)
7. Python, 23 (mbomb007)
8. Ruby, 27 (histocrat)
9. SAS, 28 (ConMan)
10. Ruby, 29 (histocrat)
11. Python, 30 (mbomb007)
12. JavaScript, 31 (hsl)
13. Ruby, 33 (histocrat)
14. Marbelous, 37 (es1024)
15. Ruby, 43 (histocrat)
16. PHP, 44 (kenorb)
17. Ruby, 45 (histocrat)
18. Marbelous, 45 (es1024)
19. Python 2, 45 (Emil)
20. PHP, 46 (Ismael Miguel)
21. Haskell, 48 (nooodl)
22. Python, 51 (DLosc)
23. Python, 60 (Sp3000)
24. Python 2, 62 (muddyfish)
25. JavaScript, 68 (Jamie Barker)
26. Mathematica, 73 (Arcinde)
27. Haskell, 77 (proudhaskeller)
28. Python, 90 (DLosc)
29. C++, 104 (user23013)
30. ECMAScript 6, 116 (Mateon1)
31. C++11, 121 (es1024)
32. Grass, 134 (user23013)
33. PowerShell, 182 (christopherw)

Unsolved Submissions

In order of time of posting. This list courtesy of many users.

• CoffeeScript, 96 (soktinpk)
• Python 3, 70 (Sp3000)
• TinyMUSH 3.1, 20 (Muqo)
• GolfScript, 32 (Beta Decay)
• Python 2, 101 (Mateon1)
• Lua, 49 (ChipperNickel)
• Python, 61 (imallett)
• Java 6+, 218 (nhahtdh)
• CJam, 51 (Martin Büttner)
• J, 22 (FireFly)
• Marbelous, 106 (es1024)
• Marbelous, 107 (es1024)
• JavaScript, 79 (FireFly)
• CJam, 47 (user23013)
• Rust, 118 + Clojure, 106 + others (Vi.) - version 2
• Marbelous, 144 (es1024)
• Python 2, 80 (MrWonderful)
• Perl, 53 (DLosc)
• Perl, 26 (primo)
• Mathematica, 31 (Arcinde)
• Marbelous, 144 (es1024)
• Assembly, 78 (krzygorz)
• J, 14 (algorithmshark)
• Java 8, 157 (TheBestOne)

A small tool to verify solutions, courtesy of n̴̖̋h̷͉̃a̷̭̿h̸̡̅ẗ̵̨́d̷̰̀ĥ̷̳

$(function(){function e(){var e=$("#ignore-space").is(":checked");var t=$("#source").val().split("").sort();var n=$("#editor").val().split("").sort();var r,i=0;for(r=0;r<t.length;){if(t[r]==n[i]){t.splice(r,1);n.splice(i,1)}else if(t[r]>n[i]){i++}else{r++}}$("#display").val(t.join(""));n=n.join("");if(e){n=n.replace(/[\r\n\t ]/g,"")}if(n.length!=0){$("#status").addClass("bad").removeClass("good").text("Exceeded quota: "+n)}else{$("#status").addClass("good").removeClass("bad").text("OK")}}$("#source, #editor").on("keyup",function(){e()});$("#ignore-space").on("click",function(){e()});e()})

textarea{width:100%;border:thin solid emboss}#status{width:auto;border:thin solid;padding:.5em;margin:.5em 0}.bad{background-color:#FFF0F0;color:#E00}.good{background-color:#F0FFF0;color:#2C2}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<h3>Scrambled Source</h3>
<textarea id="source" class="content" rows="10"></textarea>
<h3>Unused Characters</h3>
<textarea id="display" class="content" rows="10" readonly></textarea>
<h3>Your Solution</h3>
<input type="checkbox" id="ignore-space" name="ignore-space"/>
<label for="ignore-space">Ignore space characters</label>
<div id="status" class="good">OK</div>
<textarea id="editor" class="content" rows="10"></textarea>

Answer 1

Befunge-93, size 17 (cracked)

Code

>_-,/""@
*#%+69pv

Output

@

Looks like it has probably used some non-standard feature of this interpreter.

Answer 2

BBC BASIC, 187 - Cracked

Code

$$$$$$$$$$$$$$$$$$$$$((((((((((((((((((((()))))))))))))))))))))00000000111111111111111111111111122223333447778889999999CCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHINPRRRRRRRRRRRRRRRRRRRRRRT

Output

you'll never crack me

Answer 3

PHP, 54, Cracked

Code

$$$$$$$$$$&(())11122;;;;<<====^^aaaabbbbbbceehhilow{}

Output

42

Original

$a=21;$b=21;while($b){$a^=$b;$b=($b&$a^$b)<<1;}echo$a;

Original idea

Answer 4

Python 2 - 57 Cracked

Code

''((()))+++++++,,,,.000000001111113444589abchiijmnnopprrt

Output

blue

Blue is the best colour ;)

Answer 5

PHP, 22 - Cracked by Martin Büttner

Code:

((()))*+..0117;cehinot

Output:

7

Original

echo(int)((.1+.7)*10);

Answer 6

PHP, 27 (Cracked by bwoebi)

Code:

$$((()))02679;;=__bdeehiinx

Output (default on PHP 5.4.x):

3.1415926535898

Output (default on PHP 5.5.x):

3.14159265359

Hint: It depends on your php.ini precision, so hopefully it's acceptable.

---

Original:

$_=hex2bin(7069);die($_());

Answer 7

Java, size 108

Code

forprintmymostfaultSent66{{{}}}.......;""(((())))%,*++//\\--''''''''''''main static class void public String

Output

3.141593

Answer 8

C, 28 (cracked by feersum)

0124689aimnpsssstu=;;&{}(())

Prints Hi!

Answer 9

Bash shell script, 33 characters

Code

{int wk1}'caller$' hop|hop sewer

Output

shellpower

Answer 10

Python 3, 46

Program

""''''((()))*01==bbffiiillnnnooooppprrrrrttt

Plus two newlines.

Output

'(otlotb)'

Answer 11

Java 6+ / Oracle implementation (Cracked by feersum)

Code (226 bytes)

There are 5 new line characters and 2 spaces. No other invisible/non-printable character presents.

"""  ((((((()))))))++,........
00000000000001122225677788
;;;DEIPPSSS[\\\\\\\]aaaaaaaaaaaabccccccccddeeeeeeeeeeeef
gggghiiiiiiiiiiiijllllmmmmnnnnnnnnnoooooopppppprrrrrrrr
sssssstttttttttttttttttttuuuuuuuuuuuuuvvxxyyyz
{{{{}}}}

Output

91 Unmatched closing ')'

The program has been tested to compile and run successfully on ideone, so please submit an answer with runnable demo there.

---

feersum's solution is far from my intended solution, so I will not reveal my intended solution since I'm going to modify it for a new challenge.

Answer 12

JavaScript, 285

Code

\n\n\n\n\n\n      """"""(((((((()))))))),,,,.........///////0001111222222333334566666777777889999:========ACCEGHJLLLMNORSTTX[]_aaaaaaaaaaaaaaaaaabbbccddddeeeeeeeeeeeeeeeeeefffffgghhhhhiiiiiiiiijlmmmmmnnnnnnnnnoooooooooooooooopppppqrrrrrrrrrrrrrrrrrrssssssssssssssstttttttttttttttuuuvvvwwwwxz

Note: The \ns are one character.

Output

AZ

Answer 13

Python, 41 bytes

Code:

_dtrupar_p)o_(prm(txnrr_e)i)(mei er,(.)ps

Output:

6314

Answer 14

Arithmetic (ECMAScript, Java, C, C++, BASIC, Perl, Python, Ruby), 31

Code

((((((()))))))****++++111122222

Output

77

Answer 15

Bash

23 characters long.

Cracked by user23013 [link].

BASH_VERSION is "3.2.53(1)-release"

Source (original)

_(){ q=echo;$q "$q";};_

Source (scrambled)

;{e) $ qq"}";oh_$_=q(;c

Output

echo

Answer 16

C (gcc) - 43 - Cracked

Code

""%%&(()),7;[]aabdeeefiiiimnnnnpprrsstuux{}

Output

se7en

Trust me, you don't want to open this box...

(My unscrambled code will only work in non-strict C. For example, here)

---

Original

main(superbia){printf(&unix["%se%den"],7);}

Answer 17

Javascript (41 bytes) - Cracked

It should be a piece of cake to crack.

Here is the code:

'cccefhiinnnnooorrrrsstttttuuu)))} {(((.'

This is supposed to give the window object.

Probably will work on node.js

Have fun!

P.S.: Please don't crack it!!!

Answer 18

Python 2, 37

Code

print(len(ord(Emvies.priwilimmstys)))

Output:

1

Answer 19

Javascript (82 bytes) - Cracked

Since my first Javascript attempt was cracked in 6 hours, I decided to make another one!

Here it is:

eval('zov=~-1+(ii=1<2);if(0^1<2 in[3]<=+[])ii+[zov]+[]<<ii;//cog=lovr;s.n,r,o.j');

As the PHP answer, you can run it and it will return 0.

The unscrambled version outputs this:

131713115131713131131713115131713163131713115131713131131713115131713112713171311513171313113171386

I hope that this one survives a day.

Have fun and don't crack it!!!

Answer 20

C, 63 (Cracked)

Code

int main(_){_;_<_<_;_=_;_______;printf("%d",_<=_<<_||_<<_<=_);}

Output

131088

Original Solution

__;int main(_){__=_<<_<<_;__=_<<__;_<<=__|_;printf("%d",_|__);}

Answer 21

PHP (80 bytes) - Cracked

Yes, this is one more answer from me!

Here is a new one, fresh for you all:

$$__=aAaAaa;$$___=(b^C^Fff^IIi);$$____=j^k^N^Oo^PPp;$$_____=Qrr+tTT.(UWW<XXyZ);;

As always: You can run it and it will print absolutely nothing. (same as the numeric value 0 converted to string)

The output:

:

That's right, 1 byte of output!

Go ahead and have fun with this one!

Answer 22

PHP (33 bytes) - Cracked:

This one is pretty easy to crack.

It only works on linux.

Scrambled code:

X1dFu7Te48oklB ^ HDecnX0iTch0T6g;

Output (if everything goes right):

1

---

PHP (24 bytes): (I won't count this one, untested)

This is the windows-only variation of the SAME code.

The difference is the size and that I needed to add quotes.

Scrambled:

'dc6iunXB7 ^ heoedcX4l';

Output:

1

Both scrambled codes can be run.

Have fun!!!

Answer 23

PHP (46 bytes) - Cracked:

Yet another one from me.

This one is kinda easy.

I did my best to have 1 and only 1 solution.

Here it is:

echo$o=rand(m^z&E+$i,$i=(H<Y)or$Y[$i+f<<z]);;;

And outputs:

band

As with some of my previous answers:

• PHP (46 bytes)
• Javascript (82 bytes)
• PHP (80 bytes)

You can run the scrambled code.
Depending on it's mood, outputs either 0 or 1.

Have fun!

Answer 24

Bash 4.2.47(1) on Linux, 47 characters

${porcel-=str('pix fep\n     pp/pp/'); fec1/; }

Output, without newline:

pp

Finding some solution is easy:

printf pp;o='${cel-sr(xe\     pp/pp/) fec1/; }'

Try to find the original code, without comment-like things like thow-away assignments or "hungry" identifier names.

Answer 25

Python, size 37

Scrambled:

"    "*+++.123334:=
=deefiinnoprrstuu

Output:

12369.0

Answer 26

PHP, 62 chars

"fine".Music <= radio?'==;;'(.')()+')+$yeTi:2('3(;)1$$$hoo.'.

Output:

1. Monday 2. Tuesday 

Answer 27

Perl, 53 bytes

Code:

$thriller='24'&&$prng=4;tar xvw'~'.$e/=3332+42*$i/~$r

Output:

3155242264414961265415109674813320

No trailing newline this time. Tested in Perl 5.18.2, but should work fine on other versions.

Answer 28

Marbelous, 48 (Cracked)

Code

_______&&--...../000000000011111111:<<=@@@@\{}}}

_ represents a newline.

Output

"

(Yes, just one double quote.)

JS Marbelous Interpreter

Unlike many of my other Marbelous cops, this one does not use cylindrical boards.

Answer 29

J 25

+3oh.5- #+-ii#3c!//4e.2%/

output

3

Answer 30

Marbelous, 144

Code

______________________________!!!&&+++++----..........////////0000000000000000000000111111227888::::::<<<<<<<<<=>>>>>>>>>@@@@@@AAOO\\\\^^^{}}}}}

_ represents a newline.

Output

31 2F 2E 2C 2B 29 28 26 25 23 22 20 1F 1D 1C 1A 19 17 16 14 13 11 10 0E 0D 0B 0A 08 07 05 04 02 01 

There is a space+newline at the end.

JS Marbelous Interpreter

Cylindrical boards required.

Hints:

A001651 in hexadecimal, backwards

(a >> 4) and (a << 4) >> 4