comment on

yeah, first "*" never tries 0. (update: hmm, no, it does try, for 10.. then I don't know why..) But if you actually specify the max number of matches

my $choices = join "\n   ",
   map { "(  .{$_} (?{ my \%r = \%{\$^R}; \$r{$_}++; +{ \%r } })  ){0,
+".(int($amount/$_))."}" }
                   @bills;
[download]

it works fine:

12:28pm /home/Ivancho/bin> probichka.pl 20
(?x-ism:
   ^
   (?{ +{} })
   (  .{1} (?{ my %r = %{$^R}; $r{1}++; +{ %r } })  ){0,20}
   (  .{5} (?{ my %r = %{$^R}; $r{5}++; +{ %r } })  ){0,4}
   (  .{10} (?{ my %r = %{$^R}; $r{10}++; +{ %r } })  ){0,2}
   (  .{20} (?{ my %r = %{$^R}; $r{20}++; +{ %r } })  ){0,1}
   (  .{50} (?{ my %r = %{$^R}; $r{50}++; +{ %r } })  ){0,0}
   (  .{100} (?{ my %r = %{$^R}; $r{100}++; +{ %r } })  ){0,0}
   $
   (?{ push(@matches, $^R) })
   (?!)
)

$VAR1 = [
          {
            '1' => 20
          },
          {
            '1' => 15,
            '5' => 1
          },
          {
            '1' => 10,
            '5' => 2
          },
          {
            '1' => 10,
            '10' => 1
          },
          {
            '1' => 5,
            '5' => 3
          },
          {
            '1' => 5,
            '10' => 1,
            '5' => 1
          },
          {
            '5' => 4
          },
          {
            '10' => 1,
            '5' => 2
          },
          {
            '10' => 2
          },
          {
            '20' => 1
          }
        ];
[download]

In reply to Re^2: puzzle: how many ways to make $100 by ivancho
in thread puzzle: how many ways to make $100 by davidj

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


Come for the quick hacks, stay for the epiphanies.
	PerlMonks