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(共262篇)
哥尼斯堡的“七桥问题”(欧拉回路)
7-12 哥尼斯堡的“七桥问题” (25 分) 哥尼斯堡是位于普累格河上的一座城市,它包含两个岛屿及连接它们的七座桥,如下图所示。 可否走过这样的七座桥,而且每桥只走过一次?瑞士数学家欧拉(Leonhard Euler,1707—1783)最终解决了这个问题,并由此创立了拓扑学。 这个问题如今...
2018-12-17
0
853
7-14 拯救007 (25 分)(暴力)(并查集)
7-14 拯救007 (25 分) 在老电影“007之生死关头”(Live and Let Die)中有一个情节,007被毒贩抓到一个鳄鱼池中心的小岛上,他用了一种极为大胆的方法逃脱 —— 直接踩着池子里一系列鳄鱼的大脑袋跳上岸去!(据说当年替身演员被最后一条鳄鱼咬住了脚,幸好穿的是特别加厚的靴子...
2018-12-17
0
1252
任务调度的合理性(拓扑排序裸题)
7-13 任务调度的合理性 (25 分) 假定一个工程项目由一组子任务构成,子任务之间有的可以并行执行,有的必须在完成了其它一些子任务后才能执行。“任务调度”包括一组子任务、以及每个子任务可以执行所依赖的子任务集。 比如完成一个专业的所有课程学习和毕业设计可以看成一个本科生要完成的一项工程,各门...
2018-12-17
0
603
I'm Bored!(水题,模拟???)
Being a judge is not always an interesting job! For example, it is very boring to wait for the first submission in the contest. So, judges used to ent...
2018-12-16
0
562
Minimax (预处理)(枚举)
You are given a grid consisting of n rows each of which is dived into m columns. The rows are numbered from 1 to n from top to bottom, and the columns...
2018-12-16
0
500
Even Numbers(找规律)(组合数杨辉三角)(二进制)
Yousef loves playing with functions in his free time. Today, he invents the following function: Yousef will give you a list of queries, and you need ...
2018-12-16
0
584
Cyclic Shift(字符串匹配水题)
You are given two strings a and b of the same length and consisting of lowercase English letters. You can pick at most one subsequence of string b and...
2018-12-16
0
849
Stupid Submissions(模拟)
Abed is so motivated this year, his goal is qualifying for the 2019 ACM International Collegiate Programming Contest (ACM ICPC). Therefore, he always ...
2018-12-16
0
948
Shortest Path!(最短路模拟)
Today, Husam was visiting his grandmother. Husam always takes a path such that the total distance he will walk is as minimum as possible. Husam decide...
2018-12-16
0
514
Multiplication Dilemma(乘法技巧模拟)
Multiplication operation is not always easy! For example, it is hard to calculate 27 × 20 using your mind, but it is easier to find the answer using t...
2018-12-16
0
629
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