原文:ICPC Southeast USA 2020 Regional Contest problem C: Bitonic Ordering(貪心)

題目描述 Noah suggests the following card game: You are given a deck of cards, each with a distinct positiveinteger value written on it. The cards are shuf ed and placed in a row. Your objective is toarr ...

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The 2020 ICPC Asia Macau Regional Contest

A - Accelerator 設加速器序列為 \(a_1, a_2, \cdots, a_n\),那么考慮把題目里的式子展開:\(a_n+a_na_{n-1}+a_na_{n-1}a_{n-2}+ ...

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