摘要：
There are nn people in a row. The height of the ii-th person is aiai. You can choose any subset of these people and try to arrange them into a balance 阅读全文
posted @ 2019-05-08 21:47
张浦
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摘要：
Polycarp has to solve exactly nn problems to improve his programming skill before an important programming competition. But this competition will be h 阅读全文
posted @ 2019-05-08 20:23
张浦
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