摘要： Rank of TetrisTime Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2771Accepted Submission(s): 756Problem Description自从Lele开发了Rating系统，他的Tetris事业更是如虎添翼，不久他遍把这个游戏推向了全球。为了更好的符合那些爱好者的喜好，Lele又想了一个新点子：他将制作一个全球Tetris高手排行榜，定时更新，名堂要比福布斯富豪榜还响。关于如何排名，这个不用说都知道是根据R 阅读全文

摘要： 拓 扑 排 序 一个较大的工程往往被划分成许多子工程，我们把这些子工程称作活动(activity)。在整个工程中，有些子工程(活动)必须在其它有关子工程完成之后才能开始，也就是说，一个子工程的开始是以它的所有前序子工程的结束为先决条件的，但有些子工程没有先决条件，可以安排在任何时间开始。为了形象地反... 阅读全文

摘要： Triangle LOVETime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1387Accepted Submission(s): 584Problem DescriptionRecently, scientists find that there is love between any of two people. For example, between A and B, if A don’t love B, then B must love 阅读全文

摘要： Is It A Tree?Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 421 Accepted Submission(s): 157 ... 阅读全文

摘要： A Bug's LifeTime Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 364 Accepted Submission(s): 140 Problem Description Background Professor Hopper is researching the sexual behavior of a rare species of bugs. He assumes that they featur... 阅读全文

摘要： Sequence twoTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 98 Accepted Submission(s): 46 Problem Description Search is important in the acm algorithm. When you want to solve a problem by using the search method, try to cut is ver... 阅读全文

摘要： Sequence oneTime Limit: 6000/2000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 294Accepted Submission(s): 97Problem DescriptionSearch is important in the acm algorithm. When you want to solve a problem by using the search method, try to cut is very important.Now give 阅读全文

摘要： Tempter of the BoneTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 615 Accepted Submission(s): 219 Problem Description The doggie found a bone in an ancient maze, which fascinated him a lot. However, when he picked it up, the maze... 阅读全文

摘要： Sudoku KillerTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 481 Accepted Submission(s): 176 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... 阅读全文

摘要： SticksTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3582Accepted Submission(s): 903Problem DescriptionGeorge took sticks of the same length and cut them randomly until all parts became at most 50 units long. Now he wants to return sticks to the o 阅读全文