It's confusing... Do you have any ideas?

Yes. Don't remove the use strict; use warnings; from the start of the script. It's there for a reason: it tells you what you are doing wrong. (Namely you're not clearing %graph, but rather $graph, which is a totally different variable, which you've never declared. use strict; catches that errors).

Perl 6 - second systems done right

In reply to Re^5: Tree depth by moritz
in thread Tree depth by katarinahm

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