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这题7成的ac率做了4个半钟,搞到我连奥运闭幕式都没看……不过,又恰逢我突破两位数的ac数,恰逢这题还没有留言,真是我想不留都不行。一百题过去了,我还是很烂。希望四个月内ac二百题后能有长足的进步! Followed by:
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