2016 xmas puzzle (1)

L D[AR2P#0.0] · Dec 22, 2016

Here's a simple puzzle to get your brain cells ready for another puzzle I have brewing.

Code:

I have three files on my computer:

AllOnes.txt
AllZeros.txt
OnesAndZeroes.txt

Each file contains either all ones, all zeroes, or ones and zeroes as characters
and all of the files have been misnamed.
You can read one character from one of the files.
Which file do you read the character from and how do you subsequently
rename the files so they correctly match their contents?

Answers by pm

JaxGTO · Dec 22, 2016

Because ALL the files are misnamed, read OnesAndZeros.
If it's 0 then it must be the AllZeros file.
If it's 1 then it must be the AllOnes file.
So if it's 0 then Rename it to AllZeros, rename AllOnes to OnesAndZeros and finally rename AllZeros to AllOnes.

GaryS · Dec 22, 2016

With the limitation of only reading 1 character from just 1 of the 3 files. I don't see any way to know how to name them. you would have a 50% chance either way.
if the character was a zero the file could be either Allzero or Onesandzero
if the character was a one the file could be either Allones or Onesandzerro
no way to know how the correct file name

JaxGTO · Dec 22, 2016

GaryS said:
With the limitation of only reading 1 character from just 1 of the 3 files. I don't see any way to know how to name them. you would have a 50% chance either way.
if the character was a zero the file could be either Allzero or Onesandzero
if the character was a one the file could be either Allones or Onesandzerro
no way to know how the correct file name

The hint is that they are ALL misnamed.

g.mccormick · Dec 22, 2016

I think I get what JaxGTO is saying. No file is correct.
Initial Observastions
File 1 = OnesandZero
File 2 = Zero
File 3 = Ones.

Read File1.
If character = 1, then File 1 = Ones.
File 2 Cannot be Zero since it was wrong, and cannot be Ones since File1=Ones. Sor File 2 must be OnesandZeros.
File 3 cannot be Ones and cannot be OnesandZeros so must be Zeros

JaxGTO · Dec 22, 2016

g.mccormick said:
I think I get what JaxGTO is saying. No file is correct.
Initial Observastions
File 1 = OnesandZero
File 2 = Zero
File 3 = Ones.

Read File1.
If character = 1, then File 1 = Ones.
File 2 Cannot be Zero since it was wrong, and cannot be Ones since File1=Ones. Sor File 2 must be OnesandZeros.
File 3 cannot be Ones and cannot be OnesandZeros so must be Zeros was not corr

Exactly!

jraef · Dec 22, 2016

ASSuming that in the file OnesAndZeros, the digits are 101010:

Step One:

Look at the SECOND character of the file named OnesAndZeros. If it's a 0, and the name OnesAndZeros cannot apply, then it cannot be AllOnes so it is AllZeros. If it is a 1 and the name OnesAndZeros cannot apply, then it is AllOnes.

Step 2:
Since you know the name of THAT file, the remaining 2 files must be either OnesAndZeros or the obverse of the one you known the name of. Since neither can be NAMED by it's contents, the file NAMED for the obverse of the one you found MUST be OnesAndZeros.

Step 3: the remaining file is named the opposite of the digit you read.

Steve Bailey · Dec 22, 2016

Look at the SECOND character

Why do you think you need to look at a specific character? The same logic applies no matter which character you read from the file named OnesandZeroes.

Manglemender · Dec 23, 2016

Read Char from OnesAndZeros.txt

If Char ="0" Then
rename AllOnes.txt to OnesAndZeros.txt
rename AllZeroes.txt to AllOnes.txt
rename OnesAndZeros.txt to AllZeros.txt
Else
rename AllOnes.txt to AllZeros.txt
rename AllZeroes.txt to OnesAndZeros.txt
rename OnesAndZeros.txt to AllOnes.txt
End IF

Nick

TurpoUrpo · Dec 23, 2016

You should all get banned. ANSWERS BY PM. Damn yanks.

Manglemender · Dec 23, 2016

TurpoUrpo said:
You should all get banned. ANSWERS BY PM. Damn yanks.

Oops, Sorry, didn't read that bit. too late to edit.

g.mccormick · Dec 23, 2016

TurpoUrpo said:
You should all get banned. ANSWERS BY PM. Damn yanks.

Whoops.

I stopped reading the instructions right before that last line.

Steve Bailey · Dec 23, 2016

I hope that since it took five hours before the first solution showed up in the thread, that I wasn't the only person who responded by PM.

L D[AR2P#0.0] · Dec 23, 2016

8 pms received. Dravik was the first to respond, Steve Bailey second.

Dravik · Dec 23, 2016

Fun brain teaser, thanks!

2016 xmas puzzle (1)

L D[AR2P#0.0]

Lifetime Supporting Member

JaxGTO

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GaryS

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JaxGTO

Member

g.mccormick

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JaxGTO

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jraef

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Steve Bailey

Lifetime Supporting Member + Moderator

Manglemender

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TurpoUrpo

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Manglemender

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g.mccormick

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Steve Bailey

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L D[AR2P#0.0]

Lifetime Supporting Member

Dravik

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