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Wow! Such Sequence! 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4893 Description Input For each Type 2 ("query sum") operation, output one line co 阅读全文
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Nice boat 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4902 Description There is an old country and the king fell in love with a devil. The devil a 阅读全文
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Rikka with Sequence 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5828 Description As we know, Rikka is poor at math. Yuta is worrying about this si 阅读全文