<commit_before># Checkpoint Answers Chapter 25 #
## 25.4 ##
The time complexity of inserting an element to a binary tree is O(n).  <commit_msg>Adding solution to checkpoint 25.8.<commit_after># Checkpoint Answers Chapter 25 #
## 25.4 ##
The time complexity of inserting an element to a binary tree is O(n).  

## 25.8 ##
The time complexity of deleting an element from a binary tree is O(n).  
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