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小记: 其实这个程序是编译原理这门课的综合实验,前段时间我申请免试又失败了,原因是有缺课,平时分不够,早上赖床现在尝到苦果我也是醉了……没办法,逼上梁山,只好攻克这个大boss以拿下免试资格。 选了一个最简单的文法,分析了1个多星期,终于决定开始要写的时候时间已经很紧了。 去实验室通宵了一晚,... 阅读全文
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好久没写博客了,正好趁着实现网络工程与安全的DES算法的功夫,把代码发上来。 DES的介绍可见:DES加密 原理不赘述了。。实在太多,其实就是一个形式化算法,按部就班的实现就可以,只不过有些繁琐,我写了3个晚上 = =。 主要实现了利用DES算法对一个文本文档加密,然后再将其内容解密。程序... 阅读全文
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ROADSTime Limit:1000MSMemory Limit:65536KTotal Submissions:10777Accepted:3961DescriptionN cities named with numbers 1 ... N are connected with one-way... 阅读全文
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Computer Virus on Planet PandoraTime Limit: 6000/2000 MS (Java/Others)Memory Limit: 256000/128000 K (Java/Others)Total Submission(s): 2578Accepted Sub... 阅读全文
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Wireless NetworkTime Limit:10000MSMemory Limit:65536KTotal Submissions:16065Accepted:6778DescriptionAn earthquake takes place in Southeast Asia. The A... 阅读全文
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Ubiquitous ReligionsTime Limit:5000MSMemory Limit:65536KTotal Submissions:23997Accepted:11807DescriptionThere are so many different religions in the w... 阅读全文
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食物链Time Limit:1000MSMemory Limit:10000KTotal Submissions:44168Accepted:12878Description动物王国中有三类动物A,B,C,这三类动物的食物链构成了有趣的环形。A吃B, B吃C,C吃A。现有N个动物,以1-N编号。每个... 阅读全文
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Color the ballTime Limit: 9000/3000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8984Accepted Submission(s): 4594Prob... 阅读全文
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posters时间限制:1000ms | 内存限制:65535KB难度:6描述The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been pl... 阅读全文
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Mobile phonesTime Limit:5000MSMemory Limit:65536KTotal Submissions:14489Accepted:6735DescriptionSuppose that the fourth generation mobile phone base s... 阅读全文