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Silver I
ProblemsC+
Arena
blackis0Silver I
blackis01
Silver I 683117 until Gold V

검은색은 #000000(16) 즉 0000 0000 0000 0000 0000 0000(2) 즉 0(10) 입니다. 물론 보이는게 전부는 아니랍니다(?)

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