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[Luogu] CF364D Ghd
Description 选出\(\ge\lceil\frac{n}{2}\rceil\)个数字使得他们的最大公约数最大。 Solution 神奇的随机化。 注意到一定会选\(\ge\lceil\frac{n}{2}\rceil\)个数，那么在原序列中随机选一个数，在答案序列里的概率为\(\frac{1}{2}\)。那么我们连续选\(10\)次，全错的概率就只有\(\fracJapan's hybrid model inventory of hair Ewha Rinka
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