What is the max size of source codes? 64KB?

For mock problems they are set to the default 64KB. But it may vary from problem to problem. The problem setter might set a larger allowed source code size depending on the requirements of the problem.

[B. Sort and Print] I have submitted from another pc because electricity was gone. w..

As long as you are not using multiple devices in parallel, it's fine.

[A. Triangle] [Redacted]

Posting source codes in clarification will result in disqualification.

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