Problems

SNo	Name	Logic Used	Link
1	Binary Tree to Doubly Linked List	dll connections: 4 cases	view
2	Flood-Fill Algorithm	dfs on a graph	view
3	Kth Largest Element	minHeap of size k	view
4	Kth Largest Element in a running stream	minHeap of size k	view
5	Median in a running stream	maxHeap and minHeap	view
6	Count distinct in each window	hashmap + sliding window	view