Leetcode Problem 2471. Minimum Number of Operations to Sort a Binary Tree by Level

2471. Minimum Number of Operations to Sort a Binary Tree by Level

Leetcode Solutions

Level Order Traversal and Sorting

  1. Initialize a queue for level order traversal and add the root node to it.
  2. Initialize a variable total_swaps to keep track of the total number of swaps.
  3. While the queue is not empty: a. Determine the size of the current level (number of nodes at this level). b. Collect all values of nodes at this level into a list level_values. c. For each node at this level, add its children to the queue. d. Sort the level_values list to find the sorted order. e. Count the number of swaps needed to sort the original sequence of level_values and add it to total_swaps.
  4. Return total_swaps as the result.
UML Thumbnail

BFS with In-Place Sorting

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...