code forces 1176 D. Recover it!

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code forces 1176 D. Recover it!

原题链接:https://codeforces.com/contest/1176/problem/D 题目大意是两个个数列 a , b 相同 ,如果 ai 是素数,那么b数列里添加上第ai个素数(2为第一个),如果不是素数,那么b数列里添加上ai的最大因子.现在给出添加完之后的b数列,求出a数列. 大致思路: 先从大到小排序,然后判断是不是素数,如果是素数,那就遍历一遍,找到它是第几个素数,然后输出并记录下来. 如果不是素数,就直接输出,再求出最大的因子记录下来. 写超时了好多次,修改了很多地…

思维题--code forces round# 551 div.2

思维题--code forces round# 551 div.2 题目 D. Serval and Rooted Tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Now Serval is a junior high school student in Japari Middle School, and he is…

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code forces 383 Arpa's loud Owf and Mehrdad's evil plan(有向图最小环)

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code forces 382 D Taxes（数论--哥德巴赫猜想）

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