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摘要: 原题Throwing cards away I Given is an ordered deck ofn cards numbered 1 to n with card 1 at the top and card n at the bottom. Thefollowing operation is... 阅读全文
posted @ 2015-07-16 21:58 hfcnal 阅读(1159) 评论(0) 推荐(1) 编辑