摘要：
Find K-th largest element in an array. and N is much larger than k. Notice You can swap elements in the array Find K-th largest element in an array. a 阅读全文
摘要：
Given some points and a point origin in two dimensional space, find k points out of the some points which are nearest to origin.Return these points so 阅读全文
摘要：
There are two properties in the node student id and scores, to ensure that each student will have at least 5 points, find the average of 5 highest sco 阅读全文