in reply to Re^2: The Perl 6 Coding Contest 2012
in thread The Perl 6 Coding Contest 2012

Hm. To me, that was clearly not an option.

My doubt centers around this:

0 _      _ 3
   \    /   
1 _ \  / _ 4
   \ \/ /   
2 __\/\/__ 2
    /\/\    
3 _/ /\ \_ 0
    /  \    
4 _/    \_ 1

[download]

The crossovers between: the 0 & 3 wires; and the 1 & 4 wires are "vertically adjacent". Ie. As close together vertically as two crossovers can be. It also means that the striaght through 2 wire has a large break which cannot be filled, leaving its continuity unclear.

Both of these things can be addressed like this:

0 ___    ___ 3
     \  /
1 _   \/   _ 4
   \  /\  /
2 __\/__\/__ 2
    /\  /\
3 _/  \/  \_ 0
      /\    
4 ___/  \___ 1

[download]

This makes for a much clearer diagram, but that means that all the crossovers are 'on the wire lines' rather than between them. It also may be seen to contravene the "It is considered elegant not to make the grid wider than it has to be." rule.

So maybe it would need to be something like:

0 _____  _____ 3
       \/  
1 _    /\    _ 4
   \  /  \  /
2 __\/____\/__ 2
    /\    /\
3 _/  \  /  \_ 0
       \/
4 _____/\_____ 1

[download]

But that still leaves some crossovers occurring on wire lines rather than between them. So maybe:

0 _____  _____ 3
       \/  
1 ___  /\  ___ 4
     \/  \/  
2 __ /\__/\___ 2
    /  \/  \
3 _/   /\   \_ 0
      /  \
4 ___/    \___ 1

[download]

The 2 line sucks and it destroys the natural symmetry, but it more clearly complies with the rules -- except perhaps the no wider than necessary. Unless it is necessary to be that wide in order to comply with the other rules :)

It is an interesting programming problem, but it would suck to implement a brilliant solution, only to be failed because the problem description was ambiguous.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong
Science is about questioning the status quo. Questioning authority

Replies are listed 'Best First'.
Re^4: The Perl 6 Coding Contest 2012
by moritz (Cardinal) on Dec 25, 2012 at 11:07 UTC 
    0 _      _ 3
   \    /   
1 _ \  / _ 4
   \ \/ /   
2 __\/\/__ 2
    /\/\    
3 _/ /\ \_ 0
    /  \    
4 _/    \_ 1

    [download]

    That's not an option. Crossing have to be pairwise, I.e if 0 crosses over to 1, 1 must also cross over to 0. So you have to wire it as 

    0 _____  _____ 3
       \/    
1 ___  /\  ___ 4
     \/  \/  
2 _  /\  /\  _ 2
   \/  \/  \/
3 _/\  /\  /\_ 0
     \/  \/  
4 ___/\__/\___ 1

    [download]

    Think of it as physical wires, and all you can do is to exchange two adjacent wires.

    I'll point masak to this thread so he can object if I wrote something wrong.

    Perl 6 - the future is here, just unevenly distributed
[reply]
[d/l]
[select]
      Crossing have to be pairwise,

      Sorry, but that contradicts masak's second and third examples (I think!).

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]

        I don't see the contradiction.

        Second example: 

        Input: 1234567890

Output:

0 _  _________________ 1
   \/
1 _/\  _______________ 2
     \/
2 ___/\  _____________ 3
       \/
3 _____/\  ___________ 4
         \/
4 _______/\  _________ 5
           \/
5 _________/\  _______ 6
             \/
6 ___________/\  _____ 7
               \/
7 _____________/\  ___ 8
                 \/
8 _______________/\  _ 9
                   \/
9 _________________/\_ 0

        [download]

        To make it clearer, I've added spaces between the layers: 

        0 _   __ __ __ __ __ __ __ ___ 1
   \/ 
1 _/\    __ __ __ __ __ __ ___ 2
      \/ 
2 ___ /\    __ __ __ __ __ ___ 3
         \/ 
3 ___ __ /\    __ __ __ __ ___ 4
            \/ 
4 ___ __ __ /\    __ __ __ ___ 5
               \/ 
5 ___ __ __ __ /\    __ __ ___ 6
                  \/ 
6 ___ __ __ __ __ /\    __ ___ 7
                     \/ 
7 ___ __ __ __ __ __ /\    ___ 8
                        \/ 
8 ___ __ __ __ __ __ __ /\   _ 9
                           \/
9 ___ __ __ __ __ __ __ __ /\_ 0

        [download]
        Perl 6 - the future is here, just unevenly distributed
[reply]
[d/l]
[select]

In Section Perl News