Domestic relatively good OJ platform [easy to understand]

Hello everyone , I meet you again , I'm your friend, Quan Jun .

Online Judge System （ abbreviation OJ） It's an online problem determination system . Users can submit program source code online , The system compiles and executes the source code , And through the pre-designed test data to verify the correctness of the program source code .

Technology growth platform loved by global geeks leetcode

https://leetcode-cn.com/

Peking University, POJ

http://poj.org/

China is the most popular OJ One of , There are all kinds of difficult questions .

Hangzhou University of Electronic Science and technology HDUOJ

http://acm.hdu.edu.cn/

China is the most popular OJ One of , There are many questions , Wide source .

UVA

https://uva.onlinejudge.org/

The world's largest and oldest OJ One of , The number of topics is the largest . Browsing requires FQ.

codeVs

http://codevs.cn

Today's largest Chinese OJ One of , Its ladder function allows players to practice various algorithms according to the degree of difficulty . The question bank is rich , The difficulty is moderate , You can unconditionally view the answer of the current error point .

Luogu

http://www.luogu.org/

OJ A rising star on the , Quickly occupied a lot of OJ Evaluation share , Can let players do questions according to stages to improve . Support online IDE Programming .

Big vision online evaluation BZOJ

http://www.lydsy.com/JudgeOnline/

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