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All-Pairs Testing is a test design method to deal with the combinatorics problem of defining test cases in a systematic way. 成对组合覆盖这一概念是Mandl于1985年在测试Aad编译程序时提出来的.Cohen等人应用成对组合覆盖测试技术对Unix中的“Sort”命令进行了测试.测试结果表明覆盖率高达90%以上.可见成对组合覆盖是一种非常有效的测试用例设计方法. 成对组合…
传送门 Problem Statement You are given a tree where each node is labeled from 1 to n. How many similar pairs(S) are there in this tree? A pair (A,B) is a similar pair if the following are true: node A is the ancestor of node B abs(A−B)≤T Input format: T…
作业提交时间:10月9日上课前. Design and implement an Elevator Scheduler to aim for both correctness and performance, in managed code. Skills to learn and practice: a)       Peer to peer collaboration b)       Requirement Analysis c)       Design by contract, Int…
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Special subset sums: testing Let S(A) represent the sum of elements in set A of size n. We shall call it a special sum set if for any two non-empty disjoint subsets, B and C, the following properties are true: S(B) ≠ S(C); that is, sums of subsets ca…
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In Problem 42 we dealt with triangular problems, in Problem 44 of Project Euler we deal with pentagonal number, I can only wonder if we have to deal with septagonal numbers in Problem 46. Anyway the problem reads Pentagonal numbers are generated by t…
今天的文章来自Jerry的同事,曾经的搭档郑晓霞(Zheng Kate).郑晓霞是在Jerry心中是一位很有实力的程序媛,2011年从西安某软件公司跳槽到SAP成都研究院.当时,成都研究院的CRM团队刚刚成立,Jerry和郑晓霞都在一个大组. 2012年夏天,我们接到任务,要把SAP Customer Briefing这款已经发布的iOS应用移植到Android平台.因为只有1年的期限,老板组建了一只特殊的开发团队,由Jerry, 郑晓霞和另外两位男同事组成.是的,因为需求很清楚,就是把iOS版…
DDR PHY interface bit error testing and training is provided for Double Data Rate memory systems. An integrated circuit comprises a bit error test (BERT) controller that provides a bit pattern; and a physical interface having a plurality of byte lane…