Hello everyone. I am Feruz.
I use node.js in backend development. Now I think build simple online jugde system like codeforces. Which programming languages can be created using? I find online-jugde system in github. But these days I didnt see code. Nut I want build himself.
I want do two things: 1. Compile cpp, py, pascal programs and compare solution 2. How to find some idea code users when being contest ( like codeforces contest )

Please tell me advice if you know about this. I use react, node.js(express.js) and mongodb database.

Hello codeforces community!

I want to download book kubibook.com but I can't download it. If help to me how I download ebooks this sites.

Sorry my English.

Thanks advance.

Hi people. Why on the WA6 gives out. Help me please. For the second day I can not solve this problem.
task
code
Thanks in advance