06/01/16 19:15:13
>>408
こんなのか？データは標準入力から。
my @ary=();
my @index=();
sub pushme($$)
{
my ($ary,$val)=@_;
my $i;
for($i=$val;!UNIVERSAL::isa($ary->[$i],'ARRAY');$i=$ary->[$i]){}
push(@{$ary->[$i]},$val);
}
while($_=<STDIN>){
/^(\d+)\t(\d+)$/;
if(defined($ary[$1])){
$ary[$2]=$1;
pushme(\@ary,$2);
}elsif(defined($ary[$2])){
$ary[$1]=$2;
pushme(\@ary,$1);
}else{
my @newary=($1,$2);
$ary[$1]=\@newary;
$ary[$2]=$1;
}
foreach(@ary){
if(ref($_) && ref($_) eq 'ARRAY'){
print join(",",@$_)."\n";
}
}