[理工] [DS] Subtree
[T or F]
A是B的subtree 且 B是C的subtree
所以A是C的subtree
答案是False
為什麼阿
subtree的定義不是只要能從這棵樹中找到one-to-one mapping function
就算是subtree嗎??
還是說有其他限制條件??
還是我整個定義都搞錯了...
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