Created
May 27, 2015 04:11
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#!perl | |
use strict; | |
use warnings; | |
my %digits = map { $_ => 1 } ( 0 .. 9 ); | |
sub choose ($&) { | |
my ( $set, $sub ) = @_; | |
map { $sub->($_) } grep { $set->{$_} } keys %$set; | |
} | |
sub guard { $_[1]->() if $_[0] } | |
choose { %digits, map { $_ => 0 } ( 0 ) }, sub { my $s = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s ) }, sub { my $e = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s, $e ) }, sub { my $n = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s, $e, $n ) }, sub { my $d = $_[0]; | |
choose { %digits, map { $_ => 0 } ( 0, $s, $e, $n, $d ) }, sub { my $m = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s, $e, $n, $d, $m ) }, sub { my $o = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s, $e, $n, $d, $m, $o ) }, sub { my $r = $_[0]; | |
choose { %digits, map { $_ => 0 } ( $s, $e, $n, $d, $m, $o, $r ) }, sub { my $y = $_[0]; | |
my $send = $s . $e . $n . $d; | |
my $more = $m . $o . $r . $e; | |
my $money = $m . $o . $n . $e . $y; | |
guard( ($send + $more == $money), sub { | |
printf("%d + %d = %d\n", $send, $more, $money); | |
}); | |
}}}}}}}}; |
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