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stmt |
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cond |
sub |
pod |
time |
code |
1
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package Algorithm::Graphs::TransitiveClosure; |
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3
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1
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1
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1527
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use 5.006; |
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4
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1
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43
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4
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5
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1
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1
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5
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use strict; |
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1
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2
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1
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35
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6
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1
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1
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5
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use warnings; |
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1
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15
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1
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37
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7
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1
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1
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79
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no warnings 'syntax'; |
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1
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1
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1
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46
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8
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9
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1
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1
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5
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use Exporter (); |
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1
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1
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1
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334
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10
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11
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our @ISA = qw /Exporter/; |
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our @EXPORT = qw //; |
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our @EXPORT_OK = qw /floyd_warshall/; |
14
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15
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our $VERSION = '2009110901'; |
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17
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18
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sub floyd_warshall ($) { |
19
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2
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2
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1
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75
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my $graph = shift; |
20
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2
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100
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11
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if (ref $graph eq 'HASH') { |
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50
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21
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1
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3
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my @vertices = keys %{$graph}; |
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1
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5
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22
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23
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1
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4
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foreach my $k (@vertices) { |
24
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4
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13
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foreach my $i (@vertices) { |
25
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16
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20
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foreach my $j (@vertices) { |
26
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# Don't use ||= here, to avoid autovivication. |
27
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64
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100
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100
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529
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$graph -> {$i} -> {$j} = 1 if $graph -> {$k} -> {$j} && |
28
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$graph -> {$i} -> {$k}; |
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} |
30
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} |
31
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} |
32
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} |
33
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elsif (ref $graph eq 'ARRAY') { |
34
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1
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2
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my $count = @{$graph}; |
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1
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2
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35
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1
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4
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for (my $k = 0; $k < $count; $k ++) { |
36
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4
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8
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for (my $i = 0; $i < $count; $i ++) { |
37
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16
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31
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for (my $j = 0; $j < $count; $j ++) { |
38
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64
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100
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242
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$graph -> [$i] -> [$j] ||= $graph -> [$k] -> [$j] && |
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100
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39
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$graph -> [$i] -> [$k]; |
40
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} |
41
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} |
42
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} |
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} |
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45
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2
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5
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$graph; |
46
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} |
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48
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1; |
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50
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__END__ |