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http://acm.nyist.net/JudgeOnline/problem.php?pid=7 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=779 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=469 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=852 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=893 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=49 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=759 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=773 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=6 阅读全文
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http://acm.nyist.net/JudgeOnline/problem.php?pid=23 阅读全文