经典算法和OJ网站(开发者必备) - 技术人生 - CSDN博客



经典算法和OJ网站(开发者必备) - 技术人生 - CSDN博客

Online Judge系统(简称OJ)是一个在线的判题系统。用户可以在线提交程序多种程序(如C、C++、Pascal)源代码,系统对源代码进行编译和执行,并通过预先设计的测试数据来检验程序源代码的正确性。


一个用户提交的程序在Online Judge系统下执行时将受到比较严格的限制,包括运行时间限制,内存使用限制和安全限制等。用户程序执行的结果将被Online Judge系统捕捉并保存,然后再转交给一个裁判程序。该裁判程序或者比较用户程序的输出数据和标准输出样例的差别,或者检验用户程序的输出数据是否满足一定的逻辑条件。最后系统返回给用户一个状态:通过(Accepted,AC)、答案错误(Wrong Answer,WA)、超时(Time Limit Exceed,TLE)、超过输出限制(Output Limit Exceed,OLE)、超内存(Memory Limit Exceed,MLE)、运行时错误(Runtime Error,RE)、格式错误(Presentation Error,PE)、或是无法编译(Compile Error,CE),并返回程序使用的内存、运行时间等信息。


目前有不少在线测试平台,这些平台提供了很多很好的编程题,当然著名的acm中会有很多难题,如果你想挑战自己的智力极限,如果你对编程很有兴趣,那么就可以去这些平台注册,然后编程提交,跟其他编程高手一较高下。在线测试平台往往提供多种语言的支持,对于一道题,你可以用自己喜欢的语言来编写,但是要想排名更前,就得考虑语言的效率问题,所以你会发现里面的高手多用c或c++。


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