Tools used by gennady korotkevich for programming

I would like to know the programming tools(ide, compiler, debugger) and language used by gennady korotkevich for coding competitions.

Here is the video of him coding in the competitions.

Haven’t seen the video but he uses Far Manager for ide and C++ for programming.

But it is file browsing tool right? How do we customize it for C++ programming?

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