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When will this problem be posted on the open challenges on the main part of the website?
I'm looking for a solution written in C++, couldn't find one so far. If you have one, could you please share it with me?
How is the hash in the editorial calculated?
What do you mean by non-isomorphic trees? Isomorphism is defined on two trees. Do you want the size of the set of trees for which no pair of trees are isomorphic?
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