I use a2oj ladders for my training every day. But today I can't enter here.
Browser says that this site can't be reached. Was it shut down permanently?
If yes, suggest me how can I practice better.
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Why Codeforces rating update takes a long time?
I noticed that some contest's rating updates very quickly, on the other hand, others take a long time. What's the reason behind it?
Codeforces (c) Copyright 2010-2024 Mike Mirzayanov
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