Binary Lifting
1 problems · 1 with full explanations
0 Easy1 Medium0 Hard
Binary lifting precomputes 2ᵏ-th ancestors for each node in O(n log n). LCA (lowest common ancestor) queries then run in O(log n). Useful in competitive programming for tree path queries and jumping k-steps efficiently.
How to practice
To practice Binary Lifting problems effectively, start with the Easy problems listed below, trace through each solution on paper, then re-implement without looking. When you can recognise the binary lifting pattern within 30 seconds of reading a new problem, move on to Medium difficulty. Use the related topic pages and our study guide for a structured progression.