What is the required knowledge to be Orange on Codeforces?

Started by Ernie, November 17, 2016, 07:04:54 PM

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Kieran

November 17, 2016, 07:04:54 PM
Hi, I'd like to ask you a quick question about the field of health, what is the required knowledge to be orange on codeforces? I thank you, please help me as soon as possible.
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