oj.0.12 源代码测试系统最早公开详细方式的，但是请注意，你只能看到他做了什么，看不到，怎么做的，所以几个关键代码没有公开-oj first test system source code details the way open, but please note that you can only see what he has done, can not see, how to do, so several key code is not open