295. Find Median from Data Stream
Description: Solution: In the Heap, Add elements, remove elements: O(logn), Find Max/Min elements: O(1) ex) 1. add(3): Add to small heap[O(logn)] 2. add(2): Add to small heap, small heap: 2, large heap: 0, so we find the maximum value of small heap[O(1)], and add it to large heap(O(logn)] 3. add(7): Add to small heap[O(logn)], 7 is bigger than 3, so find the max[O(1)], move to large heap[O(logn)..