I Want to Be a PM

今年是公司生死攸关的一年,公司成立一年半,以刚毕业的新人为主,一年半的时间里都是在做研发项目,试水项目。今年要真正做些能卖钱的产品了,领导和大家的压力都好大,如果挣不到钱,我们就该关门大吉了。

  项目组最近在讨论一款产品,刚有个初步想法,还要具体分析背景和行业信息。突然有点像作PM的感觉,很有兴趣。也萌生了一个想法,将来想当一个PM。那么这回就当是练练吧~~还有好多东西要学习,加油~~

c++中文C. Breach of Faith time limit per test2 seconds memory limit per test256 megabytes Breach of Faith - Supire feat.eili You and your team have worked tirelessly until you have a sequence a1,a2,…,a2n+1 of positive integers satisfying these properties. 1≤ai≤1018 for all 1≤i≤2n+1 . a1,a2,…,a2n+1 are pairwise distinct. a1=a2−a3+a4−a5+…+a2n−a2n+1 . However, the people you worked with sabotaged you because they wanted to publish this sequence first. They deleted one number from this sequence and shuffled the rest, leaving you with a sequence b1,b2,…,b2n . You have forgotten the sequence a and want to find a way to recover it. If there are many possible sequences, you can output any of them. It can be proven under the constraints of the problem that at least one sequence a exists. Input Each test contains multiple test cases. The first line contains the number of test cases t (1≤t≤104 ). The description of the test cases follows. The first line of each test case contains one integer n (1≤n≤2⋅105 ). The second line of each test case contains 2n distinct integers b1,b2,…,b2n (1≤bi≤109 ), denoting the sequence b . It is guaranteed that the sum of n over all test cases does not exceed 2⋅105 . Output For each test case, output 2n+1 distinct integers, denoting the sequence a (1≤ai≤1018 ). If there are multiple possible sequences, you can output any of them. The sequence a should satisfy the given conditions, and it should be possible to obtain b after deleting one element from a and shuffling the remaining elements. Example InputCopy 4 1 9 2 2 8 6 1 4 3 99 2 86 33 14 77 2 1 6 3 2 OutputCopy 7 9 2 1 8 4 6 9 86 99 2 77 69 14 33 4 6 1 2 3 1
03-11
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