Online programming test website

Below are several large online judge systems with a large number of competition questions over the years. register an ID, then, use your familiar language (PASCAL/C ++/Java) to write the source code and submit it. The information will be returned in real time to tell you if it is correct. Using a black box test, the system has a set of standard input and output data (which is confidential, and usually has a lot of strange data). The output and standard output of your program are exactly the same. Common returned information is AC (accepted, via) WA (wrong answer, with an error output) TLE (Time Limit exceeded, timeout) MLE (memory limit exceeded, memory overflow) re (runtime error, real-time error), etc., only the AC is considered to be the right question. This is just a brief introduction. Please take a look at the FAQs on various websites before you start. Enjoy it ~~~

Zhejiang University Online judge (zoj) Co., http://acm.zju.edu.cn.

The earliest and most famous OJ in China, with many experts doing the above. The feature is that the data is relatively difficult to drill, and there are often boundary data that you don't think of, which can test the comprehensiveness of thinking. Now I am mainly doing this on OJ.

Peking University Online judge (poj) Co., http://acm.pku.edu.cn/JudgeOnline/.

It was established later, but the question was quickly added. Now the number of questions is comparable to that of zoj, which is characterized by a large number of online competitions and weak data compared with zoj. Sometimes the same questions are the same program, on zoj, WA and poj will be able to AC

Tongji University Online judge http://acm.tongji.edu.cn/index.php

The number of this oj question cannot be compared with the previous two. The reason why we recommend this oj question is that it is Chinese. This is good news for many brothers who are not familiar with English. It also attracted many high school oier, after all, their English is still a little poor, the above questions are more biased to the high school informatics competition.

Spanish university of Valladolid online judge (ultraviolet A) http://online-judge.uva.es/problemset/

The world's largest and most famous OJ, with a huge number of questions and a huge variety of miscellaneous, data is also very tricky, and top experts all over the world are on top. It is said that if you can have more than one thousand questions on the AC, even if you send a resume to IBM or Microsoft, it will never disappoint you.

Russian Ural University Online judge (Ural) http://acm.timus.ru/

It is also an old-fashioned OJ with few questions, but it is a classic question. I did it in my high school.

Usaco online judge (usaco) http://ace.delos.com/usacogate

The training website of the National Computer Olympics (usaco) is characterized by the fact that it can continue to do so after it completes a close test. What is different from the previous OJ is that the test data can be seen, and after the test is done, you can see the standard answers, so if you can't find the reason for the above OJ's total wa at the beginning, you can try to do it here to see where the test data is generally overcast to you.