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容易想到优先队列

Posted by bsblcc at 2015-11-30 12:02:20 on Problem 1862
简单证明一下,当k不变时,2sqrt(2asqrt(bk))>22sqrt(2bsqrt(ak))的充要条件是a>b,所以每次选俩最大的合体就行了

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