CF1620F.Bipartite Array
普及/提高-
通过率:0%
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题目描述
You are given a permutation p consisting of n integers 1,2,…,n (a permutation is an array where each element from 1 to n occurs exactly once).
Let's call an array a bipartite if the following undirected graph is bipartite:
- the graph consists of n vertices;
- two vertices i and j are connected by an edge if i<j and ai>aj .
Your task is to find a bipartite array of integers a of size n , such that ai=pi or ai=−pi , or report that no such array exists. If there are multiple answers, print any of them.
输入格式
The first line contains a single integer t ( 1≤t≤2⋅105 ) — the number of test cases.
The first line of each test case contains a single integer n ( 1≤n≤106 ) — the size of the permutation.
The second line contains n integers p1,p2,…,pn .
The sum of n over all test cases doesn't exceed 106 .
输出格式
For each test case, print the answer in the following format. If such an array a does not exist, print "NO" in a single line. Otherwise, print "YES" in the first line and n integers — array a in the second line.
输入输出样例
输入#1
4 3 1 2 3 6 1 3 2 6 5 4 4 4 1 3 2 8 3 2 1 6 7 8 5 4
输出#1
YES 1 2 3 NO YES -4 -1 -3 -2 YES -3 -2 1 6 7 -8 -5 -4