New codingmarks added in the 20th week of 2018. Hot topics include:

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New codingmarks added in the 19th week of 2018. Hot topics include:

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New codingmarks added in the 17th week of 2018. Hot topics include:

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New codingmarks added in the 12th week of 2018. Hot topics include:

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New codingmarks added in the 11th week of 2018. Hot topics include:

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