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#!/usr/bin/perl
use strict;
use warnings;
use v5.10;
# Here you can vary the numbers count in series and the required sum
my $REQUIRED_SUM = 12;
my $NUMBERS_COUNT = 3;
# And define whether current series fits the conditions or not
sub isGoodSeries {
my (@numbers) = @_;
my ($sum, $evensCount) = (0, 0);
foreach (@numbers) {
$sum += $_;
if ($_ % 2 == 0) {
$evensCount++;
}
}
return $sum == $REQUIRED_SUM && $evensCount > 0;
}
sub checkAllSeries {
my @series = @_;
my $count = @series;
if ($count == $NUMBERS_COUNT) {
if (isGoodSeries(@series)) {
say "@series";
}
} else {
for my $i (1..$REQUIRED_SUM) {
my @newSeries = @series;
push(@newSeries, $i);
checkAllSeries(@newSeries);
}
}
}
checkAllSeries(());
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