You’ve finished your free lessons! 🎉
Create a free account to unlock every lesson, save your progress, keep your streak and get personal review suggestions. It takes 20 seconds.
LESSON 03 / 03
Heaps & Priority Queues
A heap always hands you the smallest (or largest) item in O(log n) — perfect for "top K", scheduling and merging sorted lists.
🎓Mediumlevel
⏱️40 minto finish
✏️1activities
