摘要:原题:http://bailian.openjudge.cn/practice/1077/ 描述 The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen
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摘要:原题:http://bailian.openjudge.cn/practice/1724/ 描述 N cities named with numbers 1 ... N are connected with one-way roads. Each road has two parameters as
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摘要:原题:http://bailian.openjudge.cn/practice/4131/ 描述 Bessie has gone to the mall's jewelry store and spies a charm bracelet. Of course, she'd like to fill
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