摘要：Given a list of Connections, which is the Connection class (the city name at both ends of the edge and a cost between them), find edges that can conne 阅读全文

摘要：A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null. Return a deep copy 阅读全文

摘要：用PriorityQueue实现Max Heap：new PriorityQueue<>((x,y) -> y-x); 阅读全文

摘要：There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have t 阅读全文

摘要：Given two rectangles, find if the given two rectangles overlap or not. Given two rectangles, find if the given two rectangles overlap or not. Given tw 阅读全文