中位数
数据流中的中位数
http://www.nowcoder.com/questionTerminal/9be0172896bd43948f8a32fb954e1be1
import java.util.Queue;
import java.util.PriorityQueue;
public class Solution {
Queue<integer>maxHeap =new PriorityQueue<>((x,y)->(y-x));//大根堆存放较小一半的数字
Queue<integer>minHeap =new PriorityQueue<>();//小根堆存放较大一半的数字
public void Insert(Integer num) {
if(maxHeap.si***Heap.size())
{
minHeap.add(num);
maxHeap.add(minHeap.poll());
}else
{
maxHeap.add(num);
minHeap.add(maxHeap.poll());
}
}</integer></integer>
public Double GetMedian() { return new Double(maxHeap.si***Heap.size()?(maxHeap.peek()+minHeap.peek())/2.0:(double)maxHeap.peek()); }
}