Petrozavodsk Summer Training Camp 2015 Day 2: Xudyh (TooSimple) Contest, Saturday, August 22, 2015 C...

Problem C. GCD Tree Input file: standard input Output file: standard output Time limit: 3 seconds Memory limit: 64 mebibytes Teacher Mai has a graph with n vertices numbered from 1 to n. For every edge(u, v), the weight is gcd(u, v). (gcd(u, v) means the greatest common divisor of number u and v). You need to find a subset of the edges that forms a tree that includes every vertex, where the total weight of all the edges in the tree is maximized. Print the total weight of these edges. Input First line of the input contains one integer T (1 ≤ T ≤ 105 ) — numbef of test cases For each test case, there is only one line containing one integer n (1 ≤ n ≤ 105 ). Output For each test case, print one integer — the answer. Examples standard input standard output 5 1 2 3 4 5 0 1 2 4 5

 

暴力打表。

优化的暴力，待填。

转载于:https://www.cnblogs.com/poler/p/7359648.html