The Nineteenth Byte

Mr. Xcoder

16:00

This Pyth program works for numbers higher than 1000

Jan Dvorak

->n{(1..n).map{|x|n**x}}

Ruby

Mr. Xcoder

@HyperNeutrino Doesn't work

HyperNeutrino

really? hm

Step Hen

@Mr.Xcoder cQuents, ::A^$ (but requires you to input n twice)

HyperNeutrino

oh wait I misread the challenge

Leaky Nun

16:01

@HyperNeutrino it isn't an arithmetic sequence

Step Hen

Interpreter is bugged, correct program should be #|A::A^$

HyperNeutrino

My Jelly submission doesn't work either

Mr. Xcoder

@HyperNeutrino It's 5, 5^2, 5^3, not 5*1, 5*2...

Okx

@StepHen invalid

Leaky Nun

@Mr.Xcoder function(n)n^(1:n)

TwiNight

16:02

APL, 4: *∘⍳⍨

Mr. Xcoder

@LeakyNun R?

Leaky Nun

@Mr.Xcoder yes

HyperNeutrino

Python: lambda x:[x**k for k in range(1,x+1)]

Jan Dvorak

Ruby can handle f[4096] just fine

Step Hen

@Okx The valid program doesn't work because it puts the interpreter in an infinite loop, just thought I'd share it anyway

Leaky Nun

16:02

@Mr.Xcoder I'll leave Pyth to you

@HyperNeutrino range(1,x+1)

programmer5000

I wish someone from se would read our feature-requests.

trichoplax

@Geobits Sorry for the 2 year wait. I think the vaporware might finally be about to condense. Final testing on meta at the moment

Mr. Xcoder

@LeakyNun I already solved it in Pyth

HyperNeutrino

@LeakyNun thanks

@trichoplax 2 years... ಠ_ಠ

Mr. Xcoder

4 mins ago, by Mr. Xcoder

Pyth, 5 bytes: m^QdS

Leaky Nun

16:03

@Mr.Xcoder use L

trichoplax

@HyperNeutrino I know - it's a lot of procrastinating even for me

3

Mr. Xcoder

@LeakyNun Will do

HyperNeutrino

@trichoplax but 2 years ಠ_ಠ lol that's a REALLY long time xD

Jelly: R*@

Leaky Nun

@HyperNeutrino *R

HyperNeutrino

Right, just got that too :P But yes, thanks.

trichoplax

16:04

@HyperNeutrino I did post other things in between :P

HyperNeutrino

@trichoplax ok good xD :P

programmer5000

I'm working on a regex for parsing PPCG answers and getting the language name & score. It's here: https://regex101.com/r/U9PesM/6
The first / second matched group is the language name, the third is the score.
If you have any improvements / suggestions, please tell me.

Okx

suggestion: don't use regex

Christopher

@HyperNeutrino fixed it

AdmBorkBork

/cries ... if PowerShell didn't need $ to designate variable names, and could use < and > instead of -lt and -gt, I'd be shorter than the 55-byte Python answer.

ah well

programmer5000

16:08

Does anyone have access to a somewhat high-res ppcg icon

HyperNeutrino

@Christopher yay

Step Hen

@programmer5000 brb taking a screen cap of @EriktheOutgolfer's profile

Erik the Outgolfer

@StepHen heh

Leaky Nun

projecteuler.net/problem=345

any insight from you guys? I'm getting stuck

obviously I won't go for the O(n!) approach

Mr. Xcoder

@LeakyNun Not sure how

Erik the Outgolfer

16:09

@LeakyNun google

Mr. Xcoder

Oh, I do

Wait

Christopher

@AdmBorkBork don't user powershell

Leaky Nun

@EriktheOutgolfer I don't. That defeats the purpose.

@Mr.Xcoder ^LQS

Jan Dvorak

@LeakyNun O(2^n) should be fine

Leaky Nun

@JanDvorak hmm... how?

Mr. Xcoder

16:10

@LeakyNun Was just writing it down ("Oh, I do", "Wait")

Jan Dvorak

Inclusion-exclusion

AdmBorkBork

@LeakyNun Simple. First you find the largest value overall, then remove that entire row and column. Then you search again to find the largest value overall, then remove that entire row and column. Then ...

Leaky Nun

@AdmBorkBork No that doesn't work

consider 4 3; 3 1

4 3
3 1

HyperNeutrino

@AdmBorkBork No that will stop on local maxima in most cases

Leaky Nun

@JanDvorak could you elaborate?

Jan Dvorak

16:11

I could, yeah...

Leaky Nun

Did you mean O(2^(n^2))?

AdmBorkBork

Ohhhh ... I misread the problem, then. I thought it was maximal per row/column, not maximal sum.

Jan Dvorak

@LeakyNun I didn't

Mr. Xcoder

CMC: Given a list, extract all the primes it contains

Okx

@Mr.Xcoder Neim, 2 bytes Λ𝐌

Jan Dvorak

16:14

require'prime';->a{a.select &:prime?}

Leaky Nun

@JanDvorak Can you?

Christopher

@HyperNeutrino wanna write of bot for my KoTH? I can't tell if i broke it

Mayube

Now to crack this C# one that redefines the Console class...

HyperNeutrino

Jelly: ÆPÐf

Mr. Xcoder

@Okx Ah, beats Pyth

HyperNeutrino

16:15

@Christopher Sure

Jan Dvorak

Actually, I meant O(n * 2**n)

Mr. Xcoder

@HyperNeutrino Doesn't beat Pyth!

Christopher

@HyperNeutrino It is worth 10 rep to me

Business Cat

Lucky I just made the is-prime operator in Gaia

Mr. Xcoder

@BusinessCat Sad or Happy bytes this time?

Business Cat

16:16

2 bytes: ṗ⁇

Mr. Xcoder

@BusinessCat Beats Pyth :(((

Business Cat

That's actually a function not a full program btw

Jim

@Mr.Xcoder Pyth, fP_TQ

Mr. Xcoder

@Jim 4 bytes: .MP_

Business Cat

Since I don't have list parsing from input yet ಠ_ಠ

AdmBorkBork

16:17

@Mr.Xcoder PowerShell, 39 bytes -- $args|?{'1'*$_-match'^(?!(..+)\1+$)..'}

Mr. Xcoder

Nice

DJMcMayhem

@Mr.Xcoder 4 bytes in MATL: tZp)

Mr. Xcoder

Tied :)

AdmBorkBork

Oh, I have a name for my language

New Meta Posts

1

Q: Why is chat called "The Nineteenth Byte"?

Why is the main chatroom for Programming Puzzles & Code Golf called "The Nineteenth Byte"? Where did the name come from? Is it a reference to something?

AdmBorkBork

16:19

Just came up with it

Leaky Nun

@JanDvorak I'm not having any idea...

Business Cat

My python for this is over 60 bytes there must be something wrong

Jan Dvorak

Think about searching the longest path in a hypercube graph.

Mr. Xcoder

@AdmBorkBork Share it with us?

DJMcMayhem

Also four in jelly: ÆPÐf

Mr. Xcoder

16:20

@DJMcMayhem You've been ninja'd by someone

Leaky Nun

5 mins ago, by HyperNeutrino

Jelly: ÆPÐf

Mr. Xcoder

5 mins ago, by HyperNeutrino

Jelly: ÆPÐf

And now I got

AdmBorkBork

Pish-Posh: declaring one's opinions or thoughts absurd, irrelevant or redundant .... includes "Posh" as shorthand for PowerShell, and works to remove redundancies.

HyperNeutrino

@Mr.Xcoder lol your ninja statement is ninja'd

Jim

@Mr.Xcoder I don't get it

Mr. Xcoder

16:22

@Jim We filter for the elements that are prime and extract the maximal values, which are True. Remember, True>False, because 1>0

> .M <l:Z> <seq> Filter B for elements x for which A(x) takes its maximal value.

Christopher

Python is a pain in the snake

totallyhuman

no

Okx

python is overrated

Mr. Xcoder

@Okx It ain't

Christopher

no

HyperNeutrino

16:23

Python is cool

Okx

it's the go-to language for teaching

totallyhuman

yes

Christopher

@HyperNeutrino how do I fix my error

HyperNeutrino

I'd be glad if my school taught Python

totallyhuman

magic

Christopher

16:23

@Okx FALSE. It is java

Mr. Xcoder

We are thought C++, so, False

totallyhuman

^^^^

HyperNeutrino

@Christopher Well return values exist...

Christopher

@HyperNeutrino But that makes my life harder. It is simpler for python to change

(doing it now)

HyperNeutrino

lol I'll start working on a new controller too, and if I get mine to work before yours I'll just send teh codez

Jim

16:25

@Mr.Xcoder Oh, I see. I failed to understand it completed to .MP_ZQ

Mr. Xcoder

I have a challenge idea C++ is to Mr. Xcoder what 05AB1E is to Jelly

Christopher

@HyperNeutrino Cool it may work better

Mr. Xcoder

@Jim Right

Creative, isn't it?

Step Hen

@Okx Um... I was taught Visual Basic (.NET)... boo

Mr. Xcoder

@StepHen That's way better than C++ anyway

Okx

16:26

i can't speak for everyone

Jim

@Mr.Xcoder Yes, the filter on max is nice

Step Hen

@Mr.Xcoder And a whole crap ton less useful in industry

Mr. Xcoder

C++ is used for softwares and... Nintendo?

Leaky Nun

@Mr.Xcoder terribly ungolfed, 68 bytes: ((({})<>)){({}<(<()>)<>(({})){({}<<>({}({}))<>>[()])}{}<>>[()])}{}{}

Christopher

@HyperNeutrino i have another version, may be bork

HyperNeutrino

16:27

ok

Step Hen

@Mr.Xcoder tiobe.com/tiobe-index

Somehow VB is moving up in the list, dunno how that happened

Mr. Xcoder

@LeakyNun Wow

totallyhuman

c is used for liek everything unfortunately

Christopher

Still borked code

Mr. Xcoder

@totallyhuman UN~~fortunately~~

totallyhuman

16:28

@Mr.Xcoder un?

AdmBorkBork

non-un

Mr. Xcoder

Unfortunately, C is used, that's what I meant

Step Hen

@WheatWizard what do you think of a spec for the acronym thing that is "Return all capital letters preceded by spaces or the beginning of the input"

Mr. Xcoder

CMC: Given a number, return the number squared with all the occurrences of the original number removed

5 -> (square: 25) -> 2

Business Cat

Interesting

Mr. Xcoder

16:32

6 -> (square: 36) -> 3

Leaky Nun

@Mr.Xcoder 66 bytes: ((({}))){({}<({}(<()>))(({})<{({}<({}({}))>[()])}>{})>[()])}{}{}{}

Mr. Xcoder

7 -> (square: 49) -> 49

Leaky Nun

Does not even use the second stack!

Mayube

I think the C# cop may actually be impossible

Mr. Xcoder

Brain-flak never stops surprising me

@Mayube Really?

Leaky Nun

16:34

@Mr.Xcoder 16?

Step Hen

@Mayube Maybe you aren't supposed to obey the comment? comment and clarify?

Christopher

First rule of Mini-Flak. Thou shalt not use the second stack

Mr. Xcoder

@LeakyNun 16 -> (square: 256) -> 256

Business Cat

Can I output as a string?

Mayube

@StepHen Nah the comment is where your code should go, just like the java ones

Mr. Xcoder

16:34

@BusinessCat Course

Leaky Nun

@Mr.Xcoder 3 bytes in pyth

Mr. Xcoder

@LeakyNun I should solve it

Business Cat

Also add test case: 25 -> (square: 625) -> 6

Mayube

I'm currently pouring over .NET's source trying to figure out how I can essentially reimplement Console.WriteLine

Business Cat

@Mr.Xcoder Gaia, 7 bytes: :sṙ†¤/$

Mr. Xcoder

16:36

25 -> (square: 625) -> 6

Step Hen

@Mr.Xcoder Testcase where there are multiple occurrences would be really useful

New Meta Posts

0

Q: Why is there no feature for upping your "answer" in the sandbox?

I think the Sandbox lacks a feature. I don't know what you guys do think about it but I came to think that many posts of the Sandbox get "forgotten" really fast. Even if there are activities on it. And because they are "answers" to a "question", there is no possibility of upping with a bounty or ...

discussion feature-request sandbox

AdmBorkBork

@Mr.Xcoder 26 bytes in PowerShell -- param($n)($n*$n)-replace$n

Mr. Xcoder

11 -> (square: 121) -> 121

@StepHen I can't find any

Step Hen

@Mr.Xcoder Then do we have to code for them?

Mr. Xcoder

16:37

10 -> (square: 100) -> 0

@StepHen Of course

Step Hen

@Mr.Xcoder Why, if we can prove there aren't any?

Mr. Xcoder

@StepHen If you can prove that, you must not handle anything of that kind

Leaky Nun

@Mr.Xcoder 100 returns what?

Step Hen

@LeakyNun 00

Mr. Xcoder

100 -> (square: 10000) -> 00

HyperNeutrino

16:39

@Christopher I don't think the game's guaranteed to terminate lol

Mr. Xcoder

@LeakyNun -`*

Leaky Nun

@Mr.Xcoder bingo

HyperNeutrino

I have two bots running against each other, one which adds its largest hand to the other bot's largest hand, and one which adds its smallest hand to the other bot's smallest hand. They're running in an infinite loop.

Mr. Xcoder

@LeakyNun Yaay

@LeakyNun Does not work for 100 though

It outputs nothing

Christopher

@HyperNeutrino Added a if it does not end in 5 min then no points for both sides

Mr. Xcoder

16:41

10 as well

Leaky Nun

@Mr.Xcoder never mind then

HyperNeutrino

But it's never ending. Anything I try isn't stopping

Mr. Xcoder

RULE: If the output is 0 or 00 or any run of zeros, you may chose to output nothing instead

HyperNeutrino

well finally it terminated

I used random lol

Christopher

Is that good?

Leaky Nun

16:42

@Mr.Xcoder 8 bytes then

Christopher

Can i haz teh codez

Leaky Nun

@Mr.Xcoder the 3-byte version doesn't work for 16

HyperNeutrino

hold on, that was just the preliminary test (writing controllers isn't a very quick process :P you have to make sure it won't break

Mr. Xcoder

@LeakyNun See the rule. I will try to solve it and see if I can tie you

Christopher

This is actually going to be tough for people to win

Mayube

16:42

I'm having to redefine all the needed methods in Win32Native, because they're all internal

Christopher

@HyperNeutrino remember if the bot breaks the program it is removed from challenge

Mayube

Literally importing readfile methods directly from kernel32.dll

New Main Posts

1

Q: TryItOnquine Challenge

(based on this post and the ensuing discussion on chat -- also, much thanks to Dennis for TIO!) The Challenge Choose a language that's currently available on the TryItOnline site, for example PowerShell. Write code in that language on that page, that doesn't take any input, such that when the R...

code-challenge quine optimized-output

HyperNeutrino

Don't worry, I have it that any list of two bits will do a move, any truthy return value will attempt a split, and anything else is ignored.

and any errors are caught and ignored

is that fine?

Mr. Xcoder

@LeakyNun :`*QQ`Q"

Leaky Nun

16:44

@Mr.Xcoder I had k at the final position

Mr. Xcoder

@LeakyNun That doesn't really matter though

I tied you

I'm happy

I scrolled through that list of built-ins, so...

Leaky Nun

congratulations

Mr. Xcoder

Give me a task now

If you want

Leaky Nun

later

Mr. Xcoder

Fine

Step Hen

16:46

@Mr.Xcoder Prove that no number squared can contain the original number twice

Mr. Xcoder

@StepHen Why would I do that?

Step Hen

@Mr.Xcoder This times out: Try it online!

@Mr.Xcoder And I'm curious and got stuff to do

Mr. Xcoder

I don't want and can't prove that

Step Hen

Otherwise I guess I could post it to Math.SE

Mr. Xcoder

Remember, I'm in the 7th grade :)

HyperNeutrino

16:47

@Christopher gist.github.com/alexander-liao/d9ec020c41256435a1cd71f6dad547f4

It changes the specs; do you want me to just edit the question?

Mr. Xcoder

@StepHen Unless I find a counter-example

Leaky Nun

@StepHen a number has n digits. its square has 2n or 2n-1 digits.

if it contains itself, it has to be 2n digits, and it must be the trivial case

if x contains itself, then x^2 must be x juxtaposed to itself

in other words, it would be x multiplied by 100...01

but then 100...01 x = x^2 gives x = 100...01

and the proof that this cannot be the case is left to you as an exercise.

Mr. Xcoder

I ran this:

for i in range(10000):
 print(str(i), "->",str(i**2).count(str(i))>1)

Leaky Nun

@Mr.Xcoder I used logic instead :p

Mr. Xcoder

Printed False for all

Step Hen

16:52

@Mr.Xcoder This timed out for me, so I was assuming my assumption was correct Try it online!

Mr. Xcoder

As an alternative: print(True in [str(i**2).count(str(i))>1 for i in range(100000)]), prints False, so

HyperNeutrino

@Christopher you there?

Mr. Xcoder

LCs are so useful

Step Hen

@LeakyNun It did not know/think about that little tidbit. I guess with that, it also implies that for every x, int(str(x)+str(x)) is divible by x?

Leaky Nun

@StepHen yes

because it is x times 100...01

Christopher

16:59

@HyperNeutrino Was picking fresh fruit you can edit the question

Step Hen

@Christopher For fun or for work?

Christopher

BTW it is hard to plant trees, and grow and prune them. BUT the fresh fruit is so worth

@StepHen Hungry :P

Transcript for