Thanks for pointing this out but - honestly - this whole challenge is utterly pointless. Writing a programme to calculate factorials without any additional requirement (like arbitrary large number or such) is not proving anything. If one knows that the input is between 1 and 15 the best solution is probably a lookup table. And there is an explicit formula that states the solution to two simultaneous equations, so programming a full blown algorithm for solving them is a waste of time as well.

It looks really like a lure to get people to apply for trial accounts...

It looks really like a lure to get people to apply for trial accounts...

Indeed. I guessed that going in; but was interested enough to see what was on offer.

The trouble is, their sign-up is broken; which kind of defeats their purpose.

I still think it will be interesting to see what the winning code looks like (they offer Python and Ruby + the usual compilers); and compare with the best Perl could offer.

---

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.

I'm with torvalds on this Agile (and TDD) debunked I told'em LLVM was the way to go. But did they listen!

BUky wrote:

The trouble is, their sign-up is broken; which kind of defeats their purpose.

Ha! That is sooooo characteristic of IBM. To quote a former colleague, "For every 12 people here, 1 of them knows what he's doing."

I wonder what it says about the whole thing that their content hasn't apparently passed through a proof-reading process.

For most developers it is a case of when not if they will need to deve
+lop ...

But how to get starting something ...

we will announce a winner, confirming upon one of you the honour and g
+lory ...

... the honour and glory of raising the first IBM Bluemix Programming 
+Competition
[download]

I mean, I'm sure the blurb was written by a register.co.uk hack, not an IBM hacker, but still!

Anyhow, you can submit any URLs and files, and it's not required to register for BlueMix to submit a solution (I tested), so BrowserUK I say you go for it and send them perl programs that may be disallowed, but not without embarrassing the rest of the field.

Looking at the rules closely, you get 60 seconds for your program to produce as many answers as possible, so creating enough sample data to profile your solution will itself be a bit of a task.

BrowserUK I say you go for it and send them perl programs that may be disallowed, ... Looking at the rules closely, you get 60 seconds for your program to produce as many answers as possible

We read the rules differently. My reading is that the code will be run under the bluemix environment; and automated. Thus

1. Any Perl code submitted would simply fail to run and be discarded.
2. The 60 seconds is a hard time limit.

   If your program fails to produce the required output* within that time; your program will be aborted and any results summarily discarded.

   I expect that the input file will be of fixed size and relatively small; so for all but the most ardent GP solution to problem 2, the run times for most correct solutions will be a matter of milliseconds.

*From the specificity of the output formatting requirements I suspect that the pass/fail criteria will be judged by a simple text compare of the actual output against the expected.

Given the lack of interest in this thread; I lost interest also.

---

Anyone got any experience of this phone's predecessor?

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". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

I'm with torvalds on this Agile (and TDD) debunked I told'em LLVM was the way to go. But did they listen!

What struck me was that the three programming tasks are, at least notionally, so trivial.

Well, they are only giving away a telly . . .

The keyword in your quote is "notionally". Whilst the first task is unequivocally trivial; the other two are not necessarily so.

The prize is (for me) irrelevant; the challenge is what interested me. The wording of the preamble about "brute force" made it so.

---

Anyone got any experience of this phone's predecessor?

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". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

I'm with torvalds on this Agile (and TDD) debunked I told'em LLVM was the way to go. But did they listen!

It's problem two that is the evil, mean, and wicked problem (or maybe I misunderstand it :)

Initially I thought that in the change problem they gave you denominations, but the way I read it now seems to mean they give you a list of coins, so that you can't use two of a denomination if they only list it once. In the sample data you don't need more than one coin of each denomination. So that makes the difference if you have say 7,5,2:14 Is that using all coins or two 7s?

Mojolicious::Lite just shines when it comes to making small encapsulated web apps

Question 2:

#!/usr/bin/env perl
use Mojolicious::Lite;

sub makeChange {
        my $line = shift;
        my @available = split /[,:]/,$line;
        my $changeNeeded = pop @available;
        @available = sort { $b <=> $a } @available;
        my %coins;
        while ($changeNeeded > 0 && @available > 0 ) {
                my $denom = shift @available;
                if ($denom <= $changeNeeded) {
                        $changeNeeded -= $denom;
                        $coins{$denom}++;
                        #unshift @available,$denom; #Multiple larger c
+oins?
                }
        }
        warn "Could not make change correctly: $line" if ($changeNeede
+d != 0);
        return %coins;
}

get '/' => sub {
        my $c = shift;
        $c->render(template => 'index');
};

post '/make/change' => sub {
        my $c = shift;
        my $changeToMake = $c->param('data');
        my @lines = split /\r?\n/, $changeToMake;
        my @answer = map { { makeChange($_) } } @lines;
        my @formattedAnswers;
        for my $coin (sort { $b <=> $a } @answer) {
                my @formatted;
                for (sort { $b <=> $a } keys %{$coin}) {
                        push @formatted, "$_". 'x' . "$coin->{$_}";
                }
                unshift @formattedAnswers, [ @formatted ];
        }
        $c->render(
                answer => \@answer,
                formatted=>\@formattedAnswers,
                template => 'makeChange'
        );
};


app->start;

__DATA__
@@ index.html.ep
% layout 'default';
% title 'Welcome';
        <h2>Question 2 Data Input</h2>
        <form action="/make/change" method="post" >
<textarea rows=30 cols=80 name="data" id="comment" value="" required >
</textarea>
        <input type="submit" value="Run"></input>
        </form>

@@ makeChange.html.ep
<h2>Question 2 Results</h2>
% for my $answer (@{$formatted}) {
        %== join ',',@{$answer}
        <br>
% }


@@ layouts/default.html.ep
<!DOCTYPE html>
<html>
        <head><title><%= title %></title></head>
        <body><%= content %></body>
</html>
[download]

I think you were right first time:

The line begins with a comma-separated list of coin denominations available (in pence), followed by a colon, followed by the amount of money (in pence) that needs to be served to the customer.

---

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". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

I'm with torvalds on this Agile (and TDD) debunked I told'em LLVM was the way to go. But did they listen!

that makes cents