my $h= {
(4,-1),
(2,6),
(6,4),
(3,5),
(5,-1),
(99,-1),
};
I wanna change $h to a hash like this:
$hh{2}{6}{4} = -1;
$hh{3}{5} = -1;
$hh{99} = -1;
That's to say, i wanna join them in <key,value> order,the pre-element's value is post-element's key,until the key is -1
The keys is unique ,but the "-1" is not.
How to fulfill it? Thanks
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