题目原文描述: Given a social network containing. n members and a log file containing m timestamps at which times pairs of members formed friendships, design an algorithm to determine the earliest time at which all members are connected (i.e., every member…

题目原文: Given a set of n integers S = {0,1,…,N-1}and a sequence of requests of the following form: Remove x from S Find the successor of x: the smallest y in S such thaty>=x design a data type so that all operations(except construction) take logarithmi…

题目原文: Add a method find() to the union-find data type so that find(i) returns the largest element in the connected component containing i. The operations, union(), connected(), and find() should all take logarithmic time or better. import edu.princet…

题目原文: Suppose that you have an n-story building (with floors 1 through n) and plenty of eggs. An egg breaks if it is dropped from floor T or higher and does not break otherwise. Your goal is to devise a strategy to determine the value of T given the…

题目要求: Design an algorithm for the 3-SUM problem that takes time proportional to n2 in the worst case. You may assume that you can sort the n integers in time proportional to n2 or better. 分析: <算法4>这本书提供的TwoSumFast解法为NlogN,ThreeSumFast解法为N2logN,根据课后练…

第二周课程的Elementray Sorts部分练习测验Interview Questions的第3题荷兰国旗问题很有意思.题目的原文描述如下: Dutch national flag. Given an array of n buckets, each containing a red, white, or blue pebble, sort them by color. The allowed operations are: swap(i,j): swap the pebble in buc…

题目原文: Given two integer arrays of size n , design a subquadratic algorithm to determine whether one is a permutation of the other. That is, do they contain exactly the same entries but, possibly, in a different order. 本质上就是求两个数组排序后是否相等,鉴于本节课学的是选择.插入.…

题目原文: Given two arrays a[] and b[], each containing n distinct 2D points in the plane, design a subquadratic algorithm to count the number of points that are contained both in array a[] and array b[]. 题目的目标就是计算重复point的个数,很简单,代码如下 import java.awt.Poin…

题目原文: Design an algorithm to perform an inorder traversal of a binary search tree using only a constant amount of extra space. public void traverse(BST<Key,Value> bst) { traverse(bst.root.left, bst.root); } private void traverse(Node current, Node p…

题目原文: Given a binary tree where each …