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传送门 根据国家集训队2014论文集中胡泽聪的随机化算法可以通过这道题. 对于每个数,它有12" role="presentation" style="position: relative;">1212的概率在最后的答案序列中,这样我们每次随机出序列中的一个数,然后看它的因子有没有符合条件的更新答案就行了. 代码: #include<bits/stdc++.h> #define ll long long #define N 1000005…
Ghd CodeForces - 364D John Doe offered his sister Jane Doe find the gcd of some set of numbers a. Gcd is a positive integer g, such that all number from the set are evenly divisible by g and there isn't such g' (g' > g), that all numbers of the set a…