Audire, with accusative or dative?

Should the pagination be reset when changing the order?

The relationship of noch nicht and the passive voice

What are sources for Magic Items that are not adventure-specific?

What was the deeper meaning of Hermione wanting the cloak?

All numbers in a 5x5 Minesweeper grid

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Is there any actual security benefit to restricting foreign IPs?

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Delete empty subfolders, keep parent folder

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Removing rows containing NA in every column

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Find all files in directories named foo

Microservices and Stored Procedures

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How to influence manager to not schedule team meetings during lunch?

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How does one calculate the distribution of the Matt Colville way of rolling stats?

I reverse the source code, you negate the input!

I double the source, you double the output!I reverse the source code, you negate the output!Character counts in source codeSource Code MetamorphosisQuine / Reverse QuineDouble-duty quine: quine!dlroW ,olleHInput ∩ Source CodeSource code GO!I double the source, you double the output!Third time the charmQuine outputs itself in binaryI reverse the source code, you negate the output!

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

8

0

$begingroup$

Blatant rip-off of a rip-off. Go upvote those!

Your task, if you wish to accept it, is to write a program/function that outputs/returns its integer input/argument. The tricky part is that if I reverse your source code, the output must be the original integer negated.

Examples

Let's say your source code is ABC and its input is 4. If I write CBA instead and run it, the output must be -4.

Let's say your source code is ABC and its input is -2. If I write CBA instead and run it, the output must be 2.

An input of 0 may give 0 or -0, however, if you do support signed zero, -0 should give 0.

code-golf math number source-layout

share|improve this question

asked 8 hours ago

AdámAdám

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$endgroup$

add a comment
 | 

8

0

$begingroup$

Blatant rip-off of a rip-off. Go upvote those!

Your task, if you wish to accept it, is to write a program/function that outputs/returns its integer input/argument. The tricky part is that if I reverse your source code, the output must be the original integer negated.

Examples

Let's say your source code is ABC and its input is 4. If I write CBA instead and run it, the output must be -4.

Let's say your source code is ABC and its input is -2. If I write CBA instead and run it, the output must be 2.

An input of 0 may give 0 or -0, however, if you do support signed zero, -0 should give 0.

code-golf math number source-layout

share|improve this question

asked 8 hours ago

AdámAdám

29.8k22 gold badges8282 silver badges214214 bronze badges

$endgroup$

add a comment
 | 

$begingroup$

Blatant rip-off of a rip-off. Go upvote those!

Your task, if you wish to accept it, is to write a program/function that outputs/returns its integer input/argument. The tricky part is that if I reverse your source code, the output must be the original integer negated.

Examples

Let's say your source code is ABC and its input is 4. If I write CBA instead and run it, the output must be -4.

Let's say your source code is ABC and its input is -2. If I write CBA instead and run it, the output must be 2.

An input of 0 may give 0 or -0, however, if you do support signed zero, -0 should give 0.

code-golf math number source-layout

share|improve this question

asked 8 hours ago

AdámAdám

29.8k22 gold badges8282 silver badges214214 bronze badges

$endgroup$

share|improve this question

asked 8 hours ago

AdámAdám

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share|improve this question

asked 8 hours ago

AdámAdám

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asked 8 hours ago

AdámAdám

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asked 8 hours ago

AdámAdám

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20 Answers
20

active

oldest

votes

2

$begingroup$

Brain-Flak, 7 bytes

#)]}improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

$endgroup$

add a comment
  

2

$begingroup$

Brain-Flak, 7 bytes

#)][(

Try it online!

Reversed:

([])#

Try it online!

shareimprove this answer

answered 5 hours ago

RileyRiley

11.2k11 gold badge1616 silver badges4848 bronze badges

$endgroup$

Brain-Flak, 7 bytes

#)]{[(

Try it online!

Reversed:

([])#

Try it online!

share|improve this answer

answered 5 hours ago

RileyRiley

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share|improve this answer

share|improve this answer

answered 5 hours ago

RileyRiley

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answered 5 hours ago

RileyRiley

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answered 5 hours ago

RileyRiley

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 | 

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 | 

1

$begingroup$

Gaia, 2 bytes

_@

Try it online!

_	| implicit push input and negate
 @	| push input
	| implicit print TOS

Reversed:

@	| push input
 _	| negate
	| implicit print TOS

share|improve this answer

answered 8 hours ago

GiuseppeGiuseppe

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1

$begingroup$

Gaia, 2 bytes

_@

Try it online!

_	| implicit push input and negate
 @	| push input
	| implicit print TOS

Reversed:

@	| push input
 _	| negate
	| implicit print TOS

share|improve this answer

answered 8 hours ago

GiuseppeGiuseppe

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$endgroup$

add a comment
 | 

1

1

1

$begingroup$

Gaia, 2 bytes

_@

Try it online!

_	| implicit push input and negate
 @	| push input
	| implicit print TOS

Reversed:

@	| push input
 _	| negate
	| implicit print TOS

share|improve this answer

answered 8 hours ago

GiuseppeGiuseppe

19.3k33 gold badges1616 silver badges7171 bronze badges

$endgroup$

Gaia, 2 bytes

_@

Try it online!

_	| implicit push input and negate
 @	| push input
	| implicit print TOS

Reversed:

@	| push input
 _	| negate
	| implicit print TOS

share|improve this answer

answered 8 hours ago

GiuseppeGiuseppe

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share|improve this answer

share|improve this answer

answered 8 hours ago

GiuseppeGiuseppe

19.3k33 gold badges1616 silver badges7171 bronze badges

answered 8 hours ago

GiuseppeGiuseppe

19.3k33 gold badges1616 silver badges7171 bronze badges

answered 8 hours ago

GiuseppeGiuseppe

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 | 

add a comment
 | 

1

$begingroup$

PowerShell, 18 14 bytes

$args#"sgra$"-

Try it online! !enilno ti yrT

First of the trivial comment-abuse answers

share|improve this answer

edited 7 hours ago

answered 8 hours ago

VeskahVeskah

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$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Oh, God. Not this again.
  $endgroup$
  – JL2210
  7 hours ago
  

  
  
  
  

add a comment
 | 

1

$begingroup$

PowerShell, 18 14 bytes

$args#"sgra$"-

Try it online! !enilno ti yrT

First of the trivial comment-abuse answers

share|improve this answer

edited 7 hours ago

answered 8 hours ago

VeskahVeskah

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$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Oh, God. Not this again.
  $endgroup$
  – JL2210
  7 hours ago
  

  
  
  
  

add a comment
 | 

1

1

1

$begingroup$

PowerShell, 18 14 bytes

$args#"sgra$"-

Try it online! !enilno ti yrT

First of the trivial comment-abuse answers

share|improve this answer

edited 7 hours ago

answered 8 hours ago

VeskahVeskah

2,25755 silver badges2424 bronze badges

$endgroup$

PowerShell, 18 14 bytes

$args#"sgra$"-

Try it online! !enilno ti yrT

First of the trivial comment-abuse answers

share|improve this answer

edited 7 hours ago

answered 8 hours ago

VeskahVeskah

2,25755 silver badges2424 bronze badges

share|improve this answer

share|improve this answer

edited 7 hours ago

edited 7 hours ago

edited 7 hours ago

answered 8 hours ago

VeskahVeskah

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answered 8 hours ago

VeskahVeskah

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answered 8 hours ago

VeskahVeskah

2,25755 silver badges2424 bronze badges

2,25755 silver badges2424 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Oh, God. Not this again.
  $endgroup$
  – JL2210
  7 hours ago
  

  
  
  
  

add a comment
 | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Oh, God. Not this again.
  $endgroup$
  – JL2210
  7 hours ago
  

  
  
  
  

1

1

$begingroup$
Oh, God. Not this again.
$endgroup$
– JL2210
7 hours ago

$begingroup$
Oh, God. Not this again.
$endgroup$
– JL2210
7 hours ago

add a comment
 | 

1

$begingroup$

05AB1E, 2 bytes

(I

Try it online!

Reversed

( negates nothing
 I pushes input

I pushes input
 ( negates input

share|improve this answer

edited 7 hours ago

answered 7 hours ago

jasanbornjasanborn

1144 bronze badges

New contributor

jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  My bad, I misunderstood
  $endgroup$
  – jasanborn
  7 hours ago
  

  
  
  
  

add a comment
 | 

1

$begingroup$

05AB1E, 2 bytes

(I

Try it online!

Reversed

( negates nothing
 I pushes input

I pushes input
 ( negates input

share|improve this answer

edited 7 hours ago

answered 7 hours ago

jasanbornjasanborn

1144 bronze badges

New contributor

jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  My bad, I misunderstood
  $endgroup$
  – jasanborn
  7 hours ago
  

  
  
  
  

add a comment
 | 

1

1

1

$begingroup$

05AB1E, 2 bytes

(I

Try it online!

Reversed

( negates nothing
 I pushes input

I pushes input
 ( negates input

share|improve this answer

edited 7 hours ago

answered 7 hours ago

jasanbornjasanborn

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jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$

05AB1E, 2 bytes

(I

Try it online!

Reversed

( negates nothing
 I pushes input

I pushes input
 ( negates input

share|improve this answer

edited 7 hours ago

answered 7 hours ago

jasanbornjasanborn

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jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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share|improve this answer

edited 7 hours ago

edited 7 hours ago

edited 7 hours ago

answered 7 hours ago

jasanbornjasanborn

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New contributor

jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 7 hours ago

jasanbornjasanborn

1144 bronze badges

answered 7 hours ago

jasanbornjasanborn

1144 bronze badges

1144 bronze badges

New contributor

jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

New contributor

jasanborn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  My bad, I misunderstood
  $endgroup$
  – jasanborn
  7 hours ago
  

  
  
  
  

add a comment
 | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  My bad, I misunderstood
  $endgroup$
  – jasanborn
  7 hours ago
  

  
  
  
  

$begingroup$
It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
$endgroup$
– Adám
7 hours ago

$begingroup$
It is supposed to only negate the input in one direction, leaving it as-is in the other. Clearly, 1-character solution cannot be valid.
$endgroup$
– Adám
7 hours ago

$begingroup$
My bad, I misunderstood
$endgroup$
– jasanborn
7 hours ago

$begingroup$
My bad, I misunderstood
$endgroup$
– jasanborn
7 hours ago

add a comment
 | 

1

$begingroup$

Jelly, 2 bytes

oN

Try it online! and its reverse.

oN - (input) OR ((input) negated)

No - ((input) negated) OR (input)

share|improve this answer

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Heh, you can also do ḷN, no need for the OR logic. :D
  $endgroup$
  – Erik the Outgolfer
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Na, words give aN aesthetic effect :)
  $endgroup$
  – Jonathan Allan
  5 hours ago
  

  
  
  
  

add a comment
 | 

1

$begingroup$

Jelly, 2 bytes

oN

Try it online! and its reverse.

oN - (input) OR ((input) negated)

No - ((input) negated) OR (input)

share|improve this answer

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Heh, you can also do ḷN, no need for the OR logic. :D
  $endgroup$
  – Erik the Outgolfer
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Na, words give aN aesthetic effect :)
  $endgroup$
  – Jonathan Allan
  5 hours ago
  

  
  
  
  

add a comment
 | 

1

1

1

$begingroup$

Jelly, 2 bytes

oN

Try it online! and its reverse.

oN - (input) OR ((input) negated)

No - ((input) negated) OR (input)

share|improve this answer

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

Jelly, 2 bytes

oN

Try it online! and its reverse.

oN - (input) OR ((input) negated)

No - ((input) negated) OR (input)

share|improve this answer

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

share|improve this answer

share|improve this answer

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

answered 7 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

60.3k55 gold badges4444 silver badges187187 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Heh, you can also do ḷN, no need for the OR logic. :D
  $endgroup$
  – Erik the Outgolfer
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Na, words give aN aesthetic effect :)
  $endgroup$
  – Jonathan Allan
  5 hours ago
  

  
  
  
  

add a comment
 | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Heh, you can also do ḷN, no need for the OR logic. :D
  $endgroup$
  – Erik the Outgolfer
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Na, words give aN aesthetic effect :)
  $endgroup$
  – Jonathan Allan
  5 hours ago
  

  
  
  
  

$begingroup$
Heh, you can also do ḷN, no need for the OR logic. :D
$endgroup$
– Erik the Outgolfer
5 hours ago

$begingroup$
Heh, you can also do ḷN, no need for the OR logic. :D
$endgroup$
– Erik the Outgolfer
5 hours ago

1

1

$begingroup$
Na, words give aN aesthetic effect :)
$endgroup$
– Jonathan Allan
5 hours ago

$begingroup$
Na, words give aN aesthetic effect :)
$endgroup$
– Jonathan Allan
5 hours ago

add a comment
 | 

1

$begingroup$

Labyrinth / Hexagony, 6 bytes

Labyrinth:

?!@!`?

Try it online! and its reverse.

Hexagony:

?!@!~?

Try it online! and its reverse.

How?

? - take a signed integer
(` / ~) - negate
! - output top-of-stack / current-memory-edge
@ - exit

share|improve this answer

edited 6 hours ago

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

add a comment
 | 

1

$begingroup$

Labyrinth / Hexagony, 6 bytes

Labyrinth:

?!@!`?

Try it online! and its reverse.

Hexagony:

?!@!~?

Try it online! and its reverse.

How?

? - take a signed integer
(` / ~) - negate
! - output top-of-stack / current-memory-edge
@ - exit

share|improve this answer

edited 6 hours ago

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

add a comment
 | 

1

1

1

$begingroup$

Labyrinth / Hexagony, 6 bytes

Labyrinth:

?!@!`?

Try it online! and its reverse.

Hexagony:

?!@!~?

Try it online! and its reverse.

How?

? - take a signed integer
(` / ~) - negate
! - output top-of-stack / current-memory-edge
@ - exit

share|improve this answer

edited 6 hours ago

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

$endgroup$

Labyrinth / Hexagony, 6 bytes

Labyrinth:

?!@!`?

Try it online! and its reverse.

Hexagony:

?!@!~?

Try it online! and its reverse.

How?

? - take a signed integer
(` / ~) - negate
! - output top-of-stack / current-memory-edge
@ - exit

share|improve this answer

edited 6 hours ago

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

share|improve this answer

share|improve this answer

edited 6 hours ago

edited 6 hours ago

edited 6 hours ago

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

answered 6 hours ago

Jonathan AllanJonathan Allan

60.3k55 gold badges4444 silver badges187187 bronze badges

60.3k55 gold badges4444 silver badges187187 bronze badges

add a comment
 | 

add a comment
 | 

1

$begingroup$

Perl 6 / Raku, 3 bytes

*-0

Try it online!

Creates a Whatever code block. Read in normally its standard block equivalent is -> x x - 0, but in reverse it becomes -> x 0 - x.

share|improve this answer

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

$endgroup$

add a comment
 | 

1

$begingroup$

Perl 6 / Raku, 3 bytes

*-0

Try it online!

Creates a Whatever code block. Read in normally its standard block equivalent is -> x x - 0, but in reverse it becomes -> x 0 - x.

share|improve this answer

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

$endgroup$

add a comment
 | 

1

1

1

$begingroup$

Perl 6 / Raku, 3 bytes

*-0

Try it online!

Creates a Whatever code block. Read in normally its standard block equivalent is -> x x - 0, but in reverse it becomes -> x 0 - x.

share|improve this answer

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

$endgroup$

Perl 6 / Raku, 3 bytes

*-0

Try it online!

Creates a Whatever code block. Read in normally its standard block equivalent is -> x x - 0, but in reverse it becomes -> x 0 - x.

share|improve this answer

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

share|improve this answer

share|improve this answer

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

answered 5 hours ago

guifaguifa

70333 silver badges1010 bronze badges

70333 silver badges1010 bronze badges

add a comment
 | 

add a comment
 | 

1

$begingroup$

Klein, 2 bytes

Works in all 12 topologies!

@-

Try it online!

Reverse

-@

Try it online!

- negates the input and @ ends the program

share|improve this answer

edited 2 hours ago

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

37.9k1010 gold badges169169 silver badges383383 bronze badges

$endgroup$

add a comment
 | 

1

$begingroup$

Klein, 2 bytes

Works in all 12 topologies!

@-

Try it online!

Reverse

-@

Try it online!

- negates the input and @ ends the program

share|improve this answer

edited 2 hours ago

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

37.9k1010 gold badges169169 silver badges383383 bronze badges

$endgroup$

add a comment
 | 

1

1

1

$begingroup$

Klein, 2 bytes

Works in all 12 topologies!

@-

Try it online!

Reverse

-@

Try it online!

- negates the input and @ ends the program

share|improve this answer

edited 2 hours ago

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

37.9k1010 gold badges169169 silver badges383383 bronze badges

$endgroup$

Klein, 2 bytes

Works in all 12 topologies!

@-

Try it online!

Reverse

-@

Try it online!

- negates the input and @ ends the program

share|improve this answer

edited 2 hours ago

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

37.9k1010 gold badges169169 silver badges383383 bronze badges

share|improve this answer

share|improve this answer

edited 2 hours ago

edited 2 hours ago

edited 2 hours ago

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

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answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

37.9k1010 gold badges169169 silver badges383383 bronze badges

answered 6 hours ago

Sriotchilism O'ZaicSriotchilism O'Zaic

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add a comment
 | 

add a comment
 | 

1

$begingroup$

J, 3 bytes

-&0

Try it online!

-&0 is "argument minus 0"

0&- is "0 minus argument"

share|improve this answer

answered 1 hour ago

JonahJonah

4,80222 gold badges1212 silver badges2222 bronze badges

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  this is really quite nice :)
  $endgroup$
  – Conor O'Brien
  48 mins ago
  

  
  
  
  

add a comment
 | 

1

$begingroup$

J, 3 bytes

-&0

Try it online!

-&0 is "argument minus 0"

0&- is "0 minus argument"

share|improve this answer

answered 1 hour ago

JonahJonah

4,80222 gold badges1212 silver badges2222 bronze badges

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  this is really quite nice :)
  $endgroup$
  – Conor O'Brien
  48 mins ago
  

  
  
  
  

add a comment
 | 

1

1

1

$begingroup$

J, 3 bytes

-&0

Try it online!

-&0 is "argument minus 0"

0&- is "0 minus argument"

share|improve this answer

answered 1 hour ago

JonahJonah

4,80222 gold badges1212 silver badges2222 bronze badges

$endgroup$

J, 3 bytes

-&0

Try it online!

-&0 is "argument minus 0"

0&- is "0 minus argument"

share|improve this answer

answered 1 hour ago

JonahJonah

4,80222 gold badges1212 silver badges2222 bronze badges

share|improve this answer

share|improve this answer

answered 1 hour ago

JonahJonah

4,80222 gold badges1212 silver badges2222 bronze badges

answered 1 hour ago

JonahJonah

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answered 1 hour ago

JonahJonah

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4,80222 gold badges1212 silver badges2222 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  this is really quite nice :)
  $endgroup$
  – Conor O'Brien
  48 mins ago
  

  
  
  
  

add a comment
 | 

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  this is really quite nice :)
  $endgroup$
  – Conor O'Brien
  48 mins ago
  

  
  
  
  

1

1

$begingroup$
this is really quite nice :)
$endgroup$
– Conor O'Brien
48 mins ago

$begingroup$
this is really quite nice :)
$endgroup$
– Conor O'Brien
48 mins ago

add a comment
 | 

0

$begingroup$

Triangular, 8 bytes

$.%..|.$

Try it online!

Ungolfed:

 $ Read an integer
 . % Output it
 . . | Negate (doesn't matter here)
. $

Reversed:

$.|..%.$

Try it online!

share|improve this answer

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Triangular, 8 bytes

$.%..|.$

Try it online!

Ungolfed:

 $ Read an integer
 . % Output it
 . . | Negate (doesn't matter here)
. $

Reversed:

$.|..%.$

Try it online!

share|improve this answer

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Triangular, 8 bytes

$.%..|.$

Try it online!

Ungolfed:

 $ Read an integer
 . % Output it
 . . | Negate (doesn't matter here)
. $

Reversed:

$.|..%.$

Try it online!

share|improve this answer

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

$endgroup$

Triangular, 8 bytes

$.%..|.$

Try it online!

Ungolfed:

 $ Read an integer
 . % Output it
 . . | Negate (doesn't matter here)
. $

Reversed:

$.|..%.$

Try it online!

share|improve this answer

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

share|improve this answer

share|improve this answer

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

answered 8 hours ago

squidsquid

1,07111 silver badge1010 bronze badges

answered 8 hours ago

squidsquid

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1,07111 silver badge1010 bronze badges

add a comment
 | 

add a comment
 | 

0

$begingroup$

Japt, 3 bytes

TnU

Try it | Reversed

Same method as my earlier solution, with T being 0 and U being the input.

share|improve this answer

answered 8 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Japt, 3 bytes

TnU

Try it | Reversed

Same method as my earlier solution, with T being 0 and U being the input.

share|improve this answer

answered 8 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Japt, 3 bytes

TnU

Try it | Reversed

Same method as my earlier solution, with T being 0 and U being the input.

share|improve this answer

answered 8 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

Japt, 3 bytes

TnU

Try it | Reversed

Same method as my earlier solution, with T being 0 and U being the input.

share|improve this answer

answered 8 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

share|improve this answer

share|improve this answer

answered 8 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

answered 8 hours ago

ShaggyShaggy

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answered 8 hours ago

ShaggyShaggy

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21.6k33 gold badges2121 silver badges7272 bronze badges

add a comment
 | 

add a comment
 | 

0

$begingroup$

V (vim), 5 bytes

É-ó--

Try it online!

Hexdump:

00000000: c92d f32d 2d .-.--

share|improve this answer

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

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$endgroup$

add a comment
 | 

0

$begingroup$

V (vim), 5 bytes

É-ó--

Try it online!

Hexdump:

00000000: c92d f32d 2d .-.--

share|improve this answer

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

42.3k1212 gold badges160160 silver badges330330 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

V (vim), 5 bytes

É-ó--

Try it online!

Hexdump:

00000000: c92d f32d 2d .-.--

share|improve this answer

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

42.3k1212 gold badges160160 silver badges330330 bronze badges

$endgroup$

V (vim), 5 bytes

É-ó--

Try it online!

Hexdump:

00000000: c92d f32d 2d .-.--

share|improve this answer

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

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share|improve this answer

share|improve this answer

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

42.3k1212 gold badges160160 silver badges330330 bronze badges

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

42.3k1212 gold badges160160 silver badges330330 bronze badges

answered 8 hours ago

DJMcMayhem♦DJMcMayhem

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add a comment
 | 

add a comment
 | 

0

$begingroup$

APL (Dyalog Unicode), 13 bytes

(⊢-∘0)⍝)⊢-∘0(

Try it online!

Trivial answer. Returns arg-0 or 0-arg.

share|improve this answer

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Whoa, this can be done trivially in three bytes!
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  

add a comment
 | 

0

$begingroup$

APL (Dyalog Unicode), 13 bytes

(⊢-∘0)⍝)⊢-∘0(

Try it online!

Trivial answer. Returns arg-0 or 0-arg.

share|improve this answer

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Whoa, this can be done trivially in three bytes!
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  

add a comment
 | 

0

0

0

$begingroup$

APL (Dyalog Unicode), 13 bytes

(⊢-∘0)⍝)⊢-∘0(

Try it online!

Trivial answer. Returns arg-0 or 0-arg.

share|improve this answer

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

$endgroup$

APL (Dyalog Unicode), 13 bytes

(⊢-∘0)⍝)⊢-∘0(

Try it online!

Trivial answer. Returns arg-0 or 0-arg.

share|improve this answer

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

share|improve this answer

share|improve this answer

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

answered 7 hours ago

J. SalléJ. Sallé

2,59844 silver badges2424 bronze badges

answered 7 hours ago

J. SalléJ. Sallé

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2,59844 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Whoa, this can be done trivially in three bytes!
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  

add a comment
 | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Whoa, this can be done trivially in three bytes!
  $endgroup$
  – Adám
  7 hours ago
  

  
  
  
  

$begingroup$
Whoa, this can be done trivially in three bytes!
$endgroup$
– Adám
7 hours ago

$begingroup$
Whoa, this can be done trivially in three bytes!
$endgroup$
– Adám
7 hours ago

add a comment
 | 

0

$begingroup$

JavaScript, 11 bytes

n=>n//n->=n

Try it Online! | Reversed

share|improve this answer

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

JavaScript, 11 bytes

n=>n//n->=n

Try it Online! | Reversed

share|improve this answer

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

JavaScript, 11 bytes

n=>n//n->=n

Try it Online! | Reversed

share|improve this answer

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

$endgroup$

JavaScript, 11 bytes

n=>n//n->=n

Try it Online! | Reversed

share|improve this answer

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

share|improve this answer

share|improve this answer

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

answered 7 hours ago

ShaggyShaggy

21.6k33 gold badges2121 silver badges7272 bronze badges

21.6k33 gold badges2121 silver badges7272 bronze badges

add a comment
 | 

add a comment
 | 

0

$begingroup$

C++ (gcc), 29 bytes

Function-like macro:

#define f(x)-x//x)x(g enifed#

Try it online!

share|improve this answer

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

C++ (gcc), 29 bytes

Function-like macro:

#define f(x)-x//x)x(g enifed#

Try it online!

share|improve this answer

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

C++ (gcc), 29 bytes

Function-like macro:

#define f(x)-x//x)x(g enifed#

Try it online!

share|improve this answer

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

$endgroup$

C++ (gcc), 29 bytes

Function-like macro:

#define f(x)-x//x)x(g enifed#

Try it online!

share|improve this answer

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

share|improve this answer

share|improve this answer

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

answered 7 hours ago

NishiokaNishioka

16144 bronze badges

16144 bronze badges

add a comment
 | 

add a comment
 | 

0

$begingroup$

Befunge-98 (FBBI), 6 bytes

&.@.-&

Try it online! Try it reversed!

share|improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Befunge-98 (FBBI), 6 bytes

&.@.-&

Try it online! Try it reversed!

share|improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Befunge-98 (FBBI), 6 bytes

&.@.-&

Try it online! Try it reversed!

share|improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

$endgroup$

Befunge-98 (FBBI), 6 bytes

&.@.-&

Try it online! Try it reversed!

share|improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

share|improve this answer

share|improve this answer

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

answered 6 hours ago

ovsovs

20.2k22 gold badges1313 silver badges6262 bronze badges

answered 6 hours ago

ovsovs

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20.2k22 gold badges1313 silver badges6262 bronze badges

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add a comment
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0

$begingroup$

Stax, 2 bytes

pN

Run and debug it

share|improve this answer

answered 6 hours ago

OliverOliver

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$endgroup$

add a comment
 | 

0

$begingroup$

Stax, 2 bytes

pN

Run and debug it

share|improve this answer

answered 6 hours ago

OliverOliver

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$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Stax, 2 bytes

pN

Run and debug it

share|improve this answer

answered 6 hours ago

OliverOliver

6,67022 gold badges99 silver badges3636 bronze badges

$endgroup$

Stax, 2 bytes

pN

Run and debug it

share|improve this answer

answered 6 hours ago

OliverOliver

6,67022 gold badges99 silver badges3636 bronze badges

share|improve this answer

share|improve this answer

answered 6 hours ago

OliverOliver

6,67022 gold badges99 silver badges3636 bronze badges

answered 6 hours ago

OliverOliver

6,67022 gold badges99 silver badges3636 bronze badges

answered 6 hours ago

OliverOliver

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6,67022 gold badges99 silver badges3636 bronze badges

add a comment
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add a comment
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0

$begingroup$

Retina 0.8.2, 13 bytes

-*$1#$
)^(|-^

Try it online! It's impossible for the first line to match anything, so nothing happens. In reverse:

^-|(^)
$#1$*-

Try it online! Explanation: Either a leading - or a leading empty string is matched. This is replaced with - repeated according to the number of empty strings that were matched.

share|improve this answer

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Retina 0.8.2, 13 bytes

-*$1#$
)^(|-^

Try it online! It's impossible for the first line to match anything, so nothing happens. In reverse:

^-|(^)
$#1$*-

Try it online! Explanation: Either a leading - or a leading empty string is matched. This is replaced with - repeated according to the number of empty strings that were matched.

share|improve this answer

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Retina 0.8.2, 13 bytes

-*$1#$
)^(|-^

Try it online! It's impossible for the first line to match anything, so nothing happens. In reverse:

^-|(^)
$#1$*-

Try it online! Explanation: Either a leading - or a leading empty string is matched. This is replaced with - repeated according to the number of empty strings that were matched.

share|improve this answer

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

$endgroup$

Retina 0.8.2, 13 bytes

-*$1#$
)^(|-^

Try it online! It's impossible for the first line to match anything, so nothing happens. In reverse:

^-|(^)
$#1$*-

Try it online! Explanation: Either a leading - or a leading empty string is matched. This is replaced with - repeated according to the number of empty strings that were matched.

share|improve this answer

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

share|improve this answer

share|improve this answer

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

answered 3 hours ago

NeilNeil

88.9k88 gold badges4646 silver badges188188 bronze badges

answered 3 hours ago

NeilNeil

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88.9k88 gold badges4646 silver badges188188 bronze badges

add a comment
 | 

add a comment
 | 

0

$begingroup$

Haskell, 8 bytes

Anonymous identity function, turning into subtraction from 0 when reversed.

id--)-0(

Try it online!

Reversed:

(0-)--di

Try it online!

share|improve this answer

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Haskell, 8 bytes

Anonymous identity function, turning into subtraction from 0 when reversed.

id--)-0(

Try it online!

Reversed:

(0-)--di

Try it online!

share|improve this answer

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Haskell, 8 bytes

Anonymous identity function, turning into subtraction from 0 when reversed.

id--)-0(

Try it online!

Reversed:

(0-)--di

Try it online!

share|improve this answer

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

$endgroup$

Haskell, 8 bytes

Anonymous identity function, turning into subtraction from 0 when reversed.

id--)-0(

Try it online!

Reversed:

(0-)--di

Try it online!

share|improve this answer

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

share|improve this answer

share|improve this answer

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

answered 3 hours ago

Ørjan JohansenØrjan Johansen

6,70411 gold badge1515 silver badges3434 bronze badges

answered 3 hours ago

Ørjan JohansenØrjan Johansen

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6,70411 gold badge1515 silver badges3434 bronze badges

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0

$begingroup$

Wolfram Language (Mathematica), 9 bytes

1&0+#-0&1

Try it online!

Forward: read ((1)&*0+#-0)&*1=#&

Backward: read ((1)&*0-#+0)&*1=-#&

share|improve this answer

edited 3 hours ago

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

$endgroup$

add a comment
 | 

0

$begingroup$

Wolfram Language (Mathematica), 9 bytes

1&0+#-0&1

Try it online!

Forward: read ((1)&*0+#-0)&*1=#&

Backward: read ((1)&*0-#+0)&*1=-#&

share|improve this answer

edited 3 hours ago

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

$endgroup$

add a comment
 | 

0

0

0

$begingroup$

Wolfram Language (Mathematica), 9 bytes

1&0+#-0&1

Try it online!

Forward: read ((1)&*0+#-0)&*1=#&

Backward: read ((1)&*0-#+0)&*1=-#&

share|improve this answer

edited 3 hours ago

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

$endgroup$

Wolfram Language (Mathematica), 9 bytes

1&0+#-0&1

Try it online!

Forward: read ((1)&*0+#-0)&*1=#&

Backward: read ((1)&*0-#+0)&*1=-#&

share|improve this answer

edited 3 hours ago

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

share|improve this answer

share|improve this answer

edited 3 hours ago

edited 3 hours ago

edited 3 hours ago

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

answered 3 hours ago

attinatattinat

2,74633 silver badges1111 bronze badges

answered 3 hours ago

attinatattinat

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2,74633 silver badges1111 bronze badges

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draft saved

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If this is an answer to a challenge…

• …Be sure to follow the challenge specification. However, please refrain from exploiting obvious loopholes. Answers abusing any of the standard loopholes are considered invalid. If you think a specification is unclear or underspecified, comment on the question instead.




• …Try to optimize your score. For instance, answers to code-golf challenges should attempt to be as short as possible. You can always include a readable version of the code in addition to the competitive one.
  Explanations of your answer make it more interesting to read and are very much encouraged.




• …Include a short header which indicates the language(s) of your code and its score, as defined by the challenge.

More generally…

• …Please make sure to answer the question and provide sufficient detail.




• …Avoid asking for help, clarification or responding to other answers (use comments instead).

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