Depth-First Search pattern
Serialize and Deserialize Binary Tree
Design an algorithm to serialize a binary tree to a string and deserialize that string back into the identical tree. There is no restriction on the encoding/decoding format. Watch it run step by step, then write your own pseudocode and get it checked by AI.
- LeetCode 297
- Hard
- 2 approaches
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Depth-First SearchLeetCode 297
Hard
From the first idea to the best one
- 01 Serialize · pre-order with null markers O(n)O(n) space
- 02 Deserialize · rebuild from the stream O(n)O(n) space
What you will learn
- How to read Serialize and Deserialize Binary Tree and spot the depth-first search pattern in it
- Serialize · pre-order with null markers: O(n) time, O(n) space
- Deserialize · rebuild from the stream: O(n) time, O(n) space
- The pseudocode for each approach, its line lit as the animation runs
- Practice: write your own pseudocode and get it checked
More Depth-First Search
See Serialize and Deserialize Binary Tree run, step by step
Sign in and this page opens on the animation, with all 18 Depth-First Search problems beside it.
DSA comes with the all labs plan and every ChaiCode batch.