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Problem DescriptionNow an emergent task for you is to open a password lock. The password is consisted of four digits. Each digit is numbered from 1 to 9.Each time, you can add or minus 1 to any digit. When add 1 to '9', the digit will change to be '1' and when minus 1 to '1', 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=2594Problem DescriptionHomer: Marge, I just figured out a way to discover some of the talents we weren’t aware we had. Marge: Yeah, what is it? Homer: Take me for example. I want to find out if I have a talent in politics, OK? Marge: OK. Homer: So I take som 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=1686Problem DescriptionThe French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book:Tout avait Pair normal, mais tout s’affirmait faux. Tout avait Fa 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=3350Problem DescriptionHave you used #define in C/C++ code like the code below?#include <stdio.h> #define MAX(a , b) ((a) > (b) ? (a) : (b)) int main() { printf("%d\n" , MAX(2 + 3 , 4)); return 0; }Run the code and get an output: 5, right? 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=1753大明A+BTime Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5483 Accepted Submission(s): 1850 Problem Description话说，经过了漫长的一个多月，小明已经成长了许多，所以他改了一个名字叫“大明”。 这时他已经不是那个只会做100以内加法的那个“小明”了，现在他甚至会任意长度的正小数的加法。现在，给你两个正 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=2531Problem Description在美式足球中，四分卫负责指挥整只球队的进攻战术和跑位，以及给接球员传球的任务。四分卫是一只球队进攻组最重要的球员，而且一般身体都相对比较弱小，所以通常球队会安排5-7名大汉来保护他，其中站在四分卫前方、排成一线的5名球员称为进攻锋线，他们通常都是135公斤左右的壮汉。 对防守方来说，攻击对手的四分卫当然是最直接的限制对手进攻的方法。如果效果好，就可以在对方四分卫传球之前将其按翻在地，称之为擒杀。擒杀是最好的鼓舞防守队士气的方法，因为对方连传球的机会都没有，进攻就结. 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=4279Problem Description Here are two numbers A and B (0 < A <= B). If B cannot be divisible by A, and A and B are not co-prime numbers, we define A as a special number of B. For each x, f(x) equals to the amount of x’s special numbers. For example, f(6 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=4287Problem Description We all use cell phone today. And we must be familiar with the intelligent English input method on the cell phone. To be specific, the number buttons may correspond to some English letters respectively, as shown below: 2 : a, b, c3 :.. 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=2222Problem DescriptionIn the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bring this feature to his image retrieval system.Every image have a long description, when users type some keywords to find 阅读全文
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http://acm.hdu.edu.cn/showproblem.php?pid=1166Problem DescriptionC国的死对头A国这段时间正在进行军事演习，所以C国间谍头子Derek和他手下Tidy又开始忙乎了。A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务就是要监视这些工兵营地的活动情况。由于采取了某种先进的监测手段，所以每个工兵营地的人数C国都掌握的一清二楚,每个工兵营地的人数都有可能发生变动，可能增加或减少若干人手,但这些都逃不过C国的监视。中央情报局要研究敌人究竟演习什么战术,所以Tidy要随时向Derek汇报某一段连续的工兵营地一共有多少人,例如De 阅读全文