Heaps

⭐  Highly recommended

1. Kth largest/smallest element in an array
1. kth largest/smallest in an array. ⭐ 
2. The Greedy merchant—"No one is wise from another man's woe” ⭐ 
3. Array vs Stream—”to heapify or not to heapify”
4. Similar Questions : Kth Element ⭐ 
5. Quick select (Optional)
2. Heaps with a payload
1. K Closest Points to Origin ⭐ 
2. Similar Questions: Heaps with a payload
3. A deeper dive
1. Heap vs Priority Queue ⭐
2. A heap up close: Simulating a max heap ⭐
4. Heaps and Sorting
1. Sort a nearly sorted (or K sorted) array
2. HeapSort: The simplest sorting algorithm.
5. Heaps and a greedy mindset
1. Reorganize String ⭐ 
2. Ugly number, Not that Ugly to be honest!
3. Similar Questions : Greedy ⭐ 
6. Heap as a pointer/K-way merge
1. Merge K Sorted Arrays ⭐ 
2. Design Twitter (K way merge in Reverse)
3. Smallest Range Covering Elements from K Lists
4. Similar Questions : K way Merge ⭐ 
7. Two heaps
1. Median from Data Stream ⭐ 
2. Similar Questions: Two Heaps