# 4 Heap

- [Median for Data Stram](/code/data-structure/5-heap/median-for-data-stram.md)
- [Kth Largest Data Stream](/code/data-structure/5-heap/kth-largest-data-stream.md)
- [Top K Words](/code/data-structure/5-heap/top-k-words.md)
- [Top K Elements](/code/data-structure/5-heap/top-k-number.md)
- [Kth Smallest Number in Sorted Matrix](/code/data-structure/5-heap/kth-smallest-number-in-sorted-matrix.md)