摘要： A. Difference Rowtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou want to arrangenintegersa1, a2, ..., anin some order in a row. Let's define the value of an arrangement as the sum of differences between all pairs of adjacent integers.More 阅读全文

摘要： B. Fixed Pointstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputA permutation of lengthnis an integer sequence such that each integer from 0 to(n - 1)appears exactly once in it. For example, sequence[0, 2, 1]is a permutation of length 3 while both 阅读全文

摘要： B. Hungry Sequencetime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputIahub and Iahubina went to a date at a luxury restaurant. Everything went fine until paying for the food. Instead of money, the waiter wants Iahub to write a Hungry sequence consist 阅读全文

摘要： Sudoku KillerTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 3367Accepted Submission(s): 1063 Problem Description自从2006年3月10日至11日的首届数独世界锦标赛以后，数独这项游戏越来越受到人们的喜爱和重视。 据说，在2008北京奥运会上，会将数独列为一个单独的项目进行比赛，冠军将有可能获得的一份巨大的奖品———HDU免费七日游外加lcy亲笔签名以及同hdu acm team 阅读全文