Sure, but runtime depends on your luck.
#!/usr/bin/env perl
use strict;
use warnings;
use List::Util qw( shuffle reduce );
my @list = qw( f a d e z x c b );
sub in_order {
my $state = 1;
our( $a, $b );
my $ordered = reduce { if( $state and $b lt $a ) { $state = undef; }
+ $b } @_;
return $state;
}
my $shuffles = 0;
my @ordered = @list;
my %memory;
until ( in_order( @ordered ) ) {
$memory{ join("\0",@ordered) } = 1;
while( 1 ) {
@ordered = shuffle( @list );
$shuffles++;
last unless $memory{ join("\0",@ordered) };
}
}
print "took $shuffles shuffles to get\n\t", join( "\n\t", @ordered ),
+"\n";
exit 0;
__END__
The cake is a lie.
The cake is a lie.
The cake is a lie.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Outside of code tags, you may need to use entities for some characters:
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
|
|