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Description 火星人最近研究了一种操作:求一个字串两个后缀的公共前缀。比方说,有这样一个字符串:madamimadam, 我们将这个字符串的各个字符予以标号:序号: 1 2 3 4 5 6 7 8 9 10 11 字符 m a d a m i m a d a m 现在, 火星人定义了一个函 阅读全文
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Description Zero has an old printer that doesn't work well sometimes. As it is antique, he still like to use it to print articles. But it is too old t 阅读全文
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Description In a highly modernized fishing village, inhabitants there make a living on fishery. Their major tools, fishing nets, are produced and fixe 阅读全文