@@ -773,12 +773,12 @@ func insertIntoBST(root *TreeNode, val int) *TreeNode {
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## 练习
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- - [] [ maximum-depth-of-binary-tree] ( https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/ )
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- - [] [ balanced-binary-tree] ( https://leetcode-cn.com/problems/balanced-binary-tree/ )
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- - [] [ binary-tree-maximum-path-sum] ( https://leetcode-cn.com/problems/binary-tree-maximum-path-sum/ )
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- - [] [ lowest-common-ancestor-of-a-binary-tree] ( https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/ )
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- - [] [ binary-tree-level-order-traversal] ( https://leetcode-cn.com/problems/binary-tree-level-order-traversal/ )
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- - [] [ binary-tree-level-order-traversal-ii] ( https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii/ )
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- - [] [ binary-tree-zigzag-level-order-traversal] ( https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal/ )
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- - [] [ validate-binary-search-tree] ( https://leetcode-cn.com/problems/validate-binary-search-tree/ )
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- - [] [ insert-into-a-binary-search-tree] ( https://leetcode-cn.com/problems/insert-into-a-binary-search-tree/ )
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+ - [X ] [ maximum-depth-of-binary-tree] ( https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/ )
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+ - [X ] [ balanced-binary-tree] ( https://leetcode-cn.com/problems/balanced-binary-tree/ )
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+ - [X ] [ binary-tree-maximum-path-sum] ( https://leetcode-cn.com/problems/binary-tree-maximum-path-sum/ )
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+ - [X ] [ lowest-common-ancestor-of-a-binary-tree] ( https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/ )
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+ - [X ] [ binary-tree-level-order-traversal] ( https://leetcode-cn.com/problems/binary-tree-level-order-traversal/ )
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+ - [X ] [ binary-tree-level-order-traversal-ii] ( https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii/ )
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+ - [X ] [ binary-tree-zigzag-level-order-traversal] ( https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal/ )
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+ - [X ] [ validate-binary-search-tree] ( https://leetcode-cn.com/problems/validate-binary-search-tree/ )
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+ - [X ] [ insert-into-a-binary-search-tree] ( https://leetcode-cn.com/problems/insert-into-a-binary-search-tree/ )
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