26 lines
415 B
Plaintext
26 lines
415 B
Plaintext
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###
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### make_partition
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###
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## Chapter 5 section 2
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sub make_partition {
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my $n = shift;
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my @agenda = [$n];
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return Iterator {
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while (@agenda) {
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my $item = pop @agenda;
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my ($largest, @rest) = @$item;
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my $min = $rest[0] || 1;
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my $max = int($largest/2);
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for ($min .. $max) {
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push @agenda, [$largest-$_, $_, @rest];
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}
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return $item;
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}
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return;
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};
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}
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