Solving Binary Tree Level Order using BFS.

Problem

Level-by-level traversal.

Pattern

This problem demonstrates the BFS pattern.

Approach

Queue-based BFS.

Solution 

  // Solution for Binary Tree Level Order
// Pattern: BFS
// O(n) time

Complexity

O(n) time

Best Practices

  • Identify the pattern before coding — pattern recognition saves time
  • Handle edge cases: empty input, single element, duplicates
  • Use descriptive variable names even in timed interviews
  • Test with the provided examples plus one custom case