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Chapter Tree: Symmetric Tree has a wrong description #43

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19 changes: 17 additions & 2 deletions C++/chapTree.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -828,10 +828,25 @@ \subsection{Symmetric Tree}


\subsubsection{描述}
Given two binary trees, write a function to check if they are equal or not.
Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).

Two binary trees are considered equal if they are structurally identical and the nodes have the same value.
For example, this binary tree is symmetric:
\begin{Code}
1
/ \
2 2
/ \ / \
3 4 4 3
\end{Code}

But the following is not:
\begin{Code}
1
/ \
2 2
\ \
3 3
\end{Code}

\subsubsection{分析}
无
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