The Nineteenth Byte

zyabin101

4:00 PM

@n4melyh4xor "Oh bother, Oh bother, Oh bother, Oh bother, Oh bother, ..."

"Control, see." "Oh b---"

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@Downgoat you're a herbivore though ;p

flawr

@El'endiaStarman Those CGI-guys are always so destructive :( But seriously it is amazing, I read that Pixar has own research labs (Disney too) just for all kinds of CGI related stuff!

noɥʇʎPʎzɐɹC

4:16 PM

> Some Homeowners Associations may not allow for the installation of heavy artillery systems, so check with them before committing to those renovations.

damn Homeowners Associations

Downgoat

@EᴀsᴛᴇʀʟʏIʀᴋ tag citation needed

DJMcMayhem

It snowed 4-5 inches overnight, and now we have a high of -18C, 0F

n4melyh4xor

@EᴀsᴛᴇʀʟʏIʀᴋ wut

why did you mark as dupe dude

it ain't a dupe!

Kritixi Lithos

@DJMcMayhem Wow, where do you live?

n4melyh4xor

there has been a tadbit different question

but this one uses input

DJMcMayhem

4:25 PM

@KritixiLithos Colorado

n4melyh4xor

I get how "output text" challenges can be dupes no matter what the text

but this one uses input and customization!

@KritixiLithos?

I don't get it

flawr

@DJMcMayhem Thanks for the C :D

n4melyh4xor

\> tfw nobody responds because rep

backslash isn't escaped lol

zyabin101

\> it doesn't work

ErikGolferエリックゴルファー

@n4melyh4xor You will soon get high-rep if you do good posts. I can't see why low rep is a reason for not replying at all.

zyabin101

4:30 PM

> no matter how hard you try

ErikGolferエリックゴルファー

\> Please, stop spamming \>.

muddyfish

I just lost the game :(

4

zyabin101

:D

I did, too.

n4melyh4xor

WHAT?

noɥʇʎPʎzɐɹC

@ErikGolferエリックゴルファー look at my SO :(

n4melyh4xor

4:30 PM

Me, spamming?

Kritixi Lithos

@muddyfish Which game?

n4melyh4xor

> it doesn't work
how can a code challenge not work?

zyabin101

@KritixiLithos The game.

noɥʇʎPʎzɐɹC

The Game (mind game)

The Game is a mental game where the objective is to avoid thinking about The Game itself. Thinking about The Game constitutes a loss, which must be announced each time it occurs. It is impossible to win most versions of The Game. Depending on the variation of The Game, the whole world, or all those aware of the game, are playing it all the time. Tactics have been developed to increase the number of people aware of The Game and thereby increase the number of losses. Though the origins of The Game are unknown, a game featuring ironic processing was played by Leo Tolstoy in 1840. == Gameplay == There...

zyabin101

And you lost it, too.

ErikGolferエリックゴルファー

4:31 PM

@n4melyh4xor Not you targeted, but I just wanted to generally stop it before it went too far.

muddyfish

@noɥʇʎPʎzɐɹC Almost ninja'd

n4melyh4xor

@ErikGolferエリックゴルファー k

noɥʇʎPʎzɐɹC

@zyabin101 You're back!

n4melyh4xor

but still

Downgoat

@noɥʇʎPʎzɐɹC .____. You're like a week late

n4melyh4xor

4:32 PM

the hell people

noɥʇʎPʎzɐɹC

@Downgoat timezones, man

zyabin101

@noɥʇʎPʎzɐɹC Not really, but kinda going back to chat.

n4melyh4xor

whatever man

quartata

@Downgoat Did you see my messages?

n4melyh4xor

but what is "unique" enough then?

quartata

4:33 PM

I suspect you've got some form of runaway process

noɥʇʎPʎzɐɹC

> The Game ends when the Prime Minister of the United Kingdom announces on television that "The Game is up."[3]

Downgoat

Yes

flawr

@noɥʇʎPʎzɐɹC your timezone is a week behind?

zyabin101

Expect me fully back after this year ends.

noɥʇʎPʎzɐɹC

@flawr Yep.

ErikGolferエリックゴルファー

4:35 PM

Too bad that the timezone thing wouldn't really work out, because timezones don't change how time flows.

noɥʇʎPʎzɐɹC

Is the SHA-256 hash of anyone's first name in here "8bc11bcaf915845691b7a06e93341985375c696d3e6f11c07a1210bd10d34efa"?. All lowwercase.

El'endia Starman

@n4melyh4xor: Perhaps if you didn't have such a negative attitude, people here would be more amenable to helping you. You're new here, so you don't have the background to understand why the regular users of PPCG make certain actions. I think I speak for pretty much everyone when I say that we're happy to help with pretty much anything. That said, being a grouch about your question getting closed as duplicate doesn't make people very willing to help.

noɥʇʎPʎzɐɹC

xorbin.com/tools/sha256-hash-calculator

Dennis

@n4melyh4xor I'm not sure I understand your comment.

El'endia Starman

@noɥʇʎPʎzɐɹC Suspicious question is suspicious.

quartata

4:36 PM

@noɥʇʎPʎzɐɹC ????

Adnan

@noɥʇʎPʎzɐɹC sujay?

zyabin101

@noɥʇʎPʎzɐɹC Mine starts with d9798854.

Kritixi Lithos

@noɥʇʎPʎzɐɹC Why? Is that your name?

noɥʇʎPʎzɐɹC

o34174618 Np.

@Adnan you...

@KritixiLithos no

Dennis

@El'endiaStarman To be fair, I have no idea why it was closed as a duplicate of the cat challenge. It would be a stretch to call it related. The only thing that is preventing me from using my reopen hammer is my confusion about the a/an rule.

noɥʇʎPʎzɐɹC

4:42 PM

@Adnan how did you crack that?

ErikGolferエリックゴルファー

@zyabin101 Lies, lies, lies. I think it is 7d6a2e3a7231455cb1ae6b6da7bde666d11372b6798c69c4335ed462ba0e01d1.

Adnan

@noɥʇʎPʎzɐɹC ¯\_(ツ)_/¯

zyabin101

Nope, I think that's the last name.

Kritixi Lithos

@noɥʇʎPʎzɐɹC Spoiler Alert: md5decrypt.net/en/Sha256

Literally the first result for SHA 256 hash to text

wyldstallyns

how do you compute this: "Find a prime number which represents a gzip file..."

how do i turn a file into a number to test its primeness

flawr

4:47 PM

@wyldstallyns use 7zip?

wyldstallyns

"All data is represented as a sequence of bits, which means any file or program can be interpreted as a number. "

base 10, base 2, base 16, base 256?

it's for a programming challenge on reddit

flawr

I guess base 2 if they are talking about bits

El'endia Starman

If you're talking about the contents on disk that uses bits, that's base 2.

Eerie ninja.

wyldstallyns

right-o

noɥʇʎPʎzɐɹC

In the Spring of 2019, Californians will go to the polls in a historic vote to decide by referendum if California should exit the Union, a #Calexit vote.

flawr

4:50 PM

Union of states?

noɥʇʎPʎzɐɹC

yescalifornia.org

betseg

m=n(n+1), i have m, how can I find n? Are floor(sqrt(m)) == n and ceil(sqrt(m)) == n+1?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Column wise Sum code-golf array-manipulation arithmetic Given a nonempty set of nonempty lists of numbers, compute the column wise sum, which is another list that has the length of the longest input list. The first entry of the output list is the sum of all the first entires of the input lists,...

El'endia Starman

I think I remember reading that there's no legal option for California to leave the USA.

wyldstallyns

texas would have figured that out already

flawr

4:52 PM

So the USA would become the un-united states of america?

(still usa, or uusa)

quartata

@noɥʇʎPʎzɐɹC s/historic/stupid/

noɥʇʎPʎzɐɹC

>The Constitution says that each state in the Union shall retain every
power which is not by the Constitution given to the federal government.
The Constitution does not give the power of secession to the federal
government, nor does it expressly prohibit the states from exercising this
power. Therefore, the power of secession is reserved to the states, or to the
people, per the Tenth Amendment.

El'endia Starman

Nah, we'd still have 49 states, so maybe more like the Mostly United States of America. MUSA

noɥʇʎPʎzɐɹC

:O

wyldstallyns

russia would love that

El'endia Starman

4:54 PM

On the other hand, the Southern states tried to secede, and look at what that got them.

betseg

Halp chat.stackexchange.com/transcript/message/34174777#34174777

El'endia Starman

@betseg You can't write some code to find out?

n4melyh4xor

betseg, basic algebra

Kritixi Lithos

Form a quadratic around that first

quartata

I love how the mathematician says to write some code and the programmer says to do some algebra

El'endia Starman

4:57 PM

@quartata Ah-hahaha, indeed...

n4melyh4xor

if m=n(n+1), divide both sides by n, ya get mn=n+1 then subtract 1 from both sides to get mn-1=n

tada

Downgoat

@El'endiaStarman AFAIK Oregon has nuclear silo so it can't be so simple as then :P

noɥʇʎPʎzɐɹC

> We'll need over 500,000 signatures to qualify for the ballot but if we do it will represent the first time in California's history that the people of California decide for themselves whether they wish to remain part of the American Union, or to leave it.

Kritixi Lithos

@n4melyh4xor If you divide both sides by n you get m/n = n+1

noɥʇʎPʎzɐɹC

wat, only .5 mil

betseg

4:58 PM

@quartata lol

n4melyh4xor

lol

okay, so m/n-1

= n

huh

but that needs n

flawr

Does anyone know whether we had a similar challenge to this one? I couldn't find anything.

Kritixi Lithos

If you rearrange the equation, you get n^2+n-m

noɥʇʎPʎzɐɹC

> We expect to begin collecting signatures soon after Donald Trump is inaugurated in January.

> Second, if we vote yes, the Governor will be required to apply for California to join the United Nations.

Kritixi Lithos

Then you use the quadratic formula and substitute the values to get two values for n

n4melyh4xor

5:00 PM

yeah

alright

El'endia Starman

I personally would just multiply out n(n+1) to get n^2+n, and then it's pretty plain to see that since n^2 < n^2+n < (n+1)^2=n^2+2n+1, then yes indeed, n = floor(sqrt(m)) and n+1 = ceil(sqrt(m)).

flawr

What if m is a square?

noɥʇʎPʎzɐɹC

> We Invoke Chapter 11 of the United Nations Charter

El'endia Starman

@flawr m was defined to be n(n+1).

flawr

@El'endiaStarman What if n and n+1 are square numbers?

:D

betseg

5:03 PM

Impossible

flawr

Nope, consider n=0

El'endia Starman

@betseg Nah, set n=0.

Dangit flawr.

flawr

Eerie ninja strikes back.

betseg

Then m=0 and sqrt(0)=0

Floor==ceil

El'endia Starman

And n+1 != ceil(sqrt(m)).

That's the only failing case, and besides, I would just do n+1 = floor(sqrt(m))+1 anyway.

Kritixi Lithos

5:05 PM

I'd insert the equation into my calculator and let it figure out

betseg

Nvm I'm working with numbers > 10000 anyeays

flawr

@betseg In the grand scheme of things these are still quite close to zero

Kritixi Lithos

n=(-1+-sqrt(1+4m))/2

betseg

@flawr bleh

El'endia Starman

@KritixiLithos Here's the thing though: you can either do a sqrt and then a floor, or a multiplication, addition, sqrt, negation, negation, addition, and division.

Kritixi Lithos

5:08 PM

I'm just giving an alternative (though probably not the most efficient...)

But this way you get 2 values of n

El'endia Starman

Not necessarily desirable. :P

Dennis

@ErikGolferエリックゴルファー Just fyi, you can always flag your own posts, even if you do not have 15 reputation.

flawr

Does anyone know whether we had a similar challenge to this one? I couldn't find anything.

noɥʇʎPʎzɐɹC

Interesting, FNV-1 seems to be the best non-cryptographic hash function; fast and low collisions.

flawr

"the best" depends on your needs

noɥʇʎPʎzɐɹC

5:19 PM

1749

A: Which hashing algorithm is best for uniqueness and speed?

I tested some different algorithms, measuring speed and number of collisions. I used three different key sets: A list of 216,553 English words (in lowercase) The numbers "1" to "216553" (think ZIP codes, and how a poor hash took down msn.com) 216,553 "random" (i.e. type 4 uuid) GUIDs For eac...

fnv-1 scores highest in both

betseg

wat

Is my battery dying

Downgoat

No

Dennis

@noɥʇʎPʎzɐɹC There's no such thing as the best hash function. In the same table, CRC32 has less collisions. While it's slower in the table, that answer is from 2012. Most recent x86-64 processors come with a CRC32 instruction, so I'd expect it to be faster on those.

feersum

It's missing another good dimension: resistance to DOS attacks.

So-called universal hashes can be used with random parameters to be collision-resistant against adversarial data.

flawr

@noɥʇʎPʎzɐɹC Still it depends on what you want to use it for. If you just want to hash numbers in the range 0,1,2,...,9 all these are probably not the "best".

TuxCopter

5:39 PM

Yay my connection finally (half) work

betseg

\o/

Dennis

Re hashing: Why on Earth would anyone hash zip codes?

DepressedDaniel

Dennis: to make them even more meaningless?

feersum

Because that's what their ancestors did before them.

DepressedDaniel

If you have few zip codes to handle in total, less than about one per zip code, you save memory by hashing rather than having a big array indexed by zip code

Anonymous

5:43 PM

@DepressedDaniel Oh man what will we ever do with those 6 extra bits?

New Main Posts

0

Q: Is this a narcissistic number?

Prelude: (I know it might be kind of a dupe of a previous challenge I made, but I had the idea to maybe step forward in small steps (considering the previous one had tons of questions).) Narcissitic numbers are natural numbers that have the following property: sum of digits to the power of th...

DepressedDaniel

there are only 43,000 or so zip codes in use, though the (old) format allows for 100,000

noɥʇʎPʎzɐɹC

@feersum Is this really effective?

n4melyh4xor

Yay, another challenge I made!

flawr

@n4melyh4xor If you don't know whether it is a dupe let it sit in the sandbox first!

n4melyh4xor

5:45 PM

I'm trying to perfect myself in discerning the rules and marking them down as much as possible.

Kritixi Lithos

@NewMainPosts That was quick

n4melyh4xor

I don't think this one's a dupe. Maybe a 2dupe4me thing since I posted something of the similiar variation 2 or 3 hours ago.

flawr

@n4melyh4xor This suggestion is displayed whenver you open the "ask new" page.

Downgoat

@ETHproductions I've been working on Tools.js and idk if you're thinking of leaving it as a completely static site, but I think it would greatly benefit from dynamic abilities and submissions which however would superscede GH page's abilities

Rohan Jhunjhunwala

This is a promotion of my own post, but here it is, I would love to see someone crack this. If I did my math correct it should be unsolvable until the end of the universe.

0

A: Significant Whitespace: Cops

Java 3248 Bytes This entry is solely to prove the possibility of a purely cryptographically secure entry. I believe this is within the rules, but if it is agains the spirit, please let me know and I will delete out of fairness. I will leave this "unsafe" indefinitely until such a time when (and ...

n4melyh4xor

5:47 PM

Checked everything: armstrong number, narcissistic number, plus perfect number.

TuxCopter

inb4 feersum crack it

n4melyh4xor

None with that name, I assume it's okay.

flawr

hammered

Anonymous

@NewMainPosts That got closed real fast

ErikGolferエリックゴルファー

@Dennis Umm... fyi, you can add a comment on my flag even if you call it 'helpful'. No need to leave it pending :)

n4melyh4xor

5:49 PM

Okay, I assumed I checked everything.

Deleted.

~~inb4 assuming makes an ass out of u and me~~

Dennis

@ErikGolferエリックゴルファー Yes, I'm aware of that. I can't/won't handle the flag right now though, since we usually give posters (especially new users) at least 48 hours to fix their post.

El'endia Starman

@n4melyh4xor Seriously, use the Sandbox. Any problems with your challenge can be worked out before you post to Main.

2

n4melyh4xor

Probably.

Yeah.

But I'm just going to chat.stackexchange and chill right now.

Anonymous

Should be "TNB and chill" :P

n4melyh4xor

Holy fork, there's a lot of you here

ErikGolferエリックゴルファー

5:53 PM

@Dennis Oh right, but I once saw that you had deleted a post only 5 hours after warning the answerer about the problem though, so I expected it to be deleted. Please remember my flag after 48 hours have passed :P

Anonymous

TNB is regularly one of the most popular rooms on the network

Rohan Jhunjhunwala

Anyone have ideas on how to crack mine?

ErikGolferエリックゴルファー

s/regularly/almost always/

Anonymous

chat.stackexchange.com/?tab=all&sort=people

n4melyh4xor

esolangs.org/wiki/CHIQRSX9%2B

but still, that language

is godly

af

"X - Makes the programming language Turing-complete."

only command you'll ever need

Anonymous

5:57 PM

Except that a) there is no interpreter, and b) it's non-deterministic

n4melyh4xor

esoteric.voxelperfect.net/files/chiqrsx9+/impl/chiqrsx9+.pl

"+ - Increments the accumulator."

ErikGolferエリックゴルファー

@Mego https://esolangs.org/wiki/CHIQRSX9%2B#External_resources There is an interpreter listed there too.

n4melyh4xor

why increment if you can't output it?

TuxCopter

@n4melyh4xor bcuz

n4melyh4xor

overflows be like

ErikGolferエリックゴルファー

5:59 PM

@n4melyh4xor Useless HQ9+ thing. Get used to it, esolangs are weird.

noɥʇʎPʎzɐɹC

CMC: guess what I've been doing

~/miniusaco 16s
❯ g++ main.cpp -O2; echo "compilation finished"; ./a.out
    compilation finished
    ^C^C^
    ^V
~/miniusaco 3m 22s
❯ g++ main.cpp -O2; echo "compilation finished"; ./a.out
    compilation finished
17
[1]    26815 killed     ./a.out

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