CF612E.Square Root of Permutation
普及/提高-
通过率:0%
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题目描述
A permutation of length n is an array containing each integer from 1 to n exactly once. For example, q=[4,5,1,2,3] is a permutation. For the permutation q the square of permutation is the permutation p that p[i]=q[q[i]] for each i=1... n . For example, the square of q=[4,5,1,2,3] is p=q2=[2,3,4,5,1] .
This problem is about the inverse operation: given the permutation p you task is to find such permutation q that q2=p . If there are several such q find any of them.
输入格式
The first line contains integer n ( 1<=n<=106 ) — the number of elements in permutation p .
The second line contains n distinct integers p1,p2,...,pn ( 1<=pi<=n ) — the elements of permutation p .
输出格式
If there is no permutation q such that q2=p print the number "-1".
If the answer exists print it. The only line should contain n different integers qi ( 1<=qi<=n ) — the elements of the permutation q . If there are several solutions print any of them.
输入输出样例
输入#1
4 2 1 4 3
输出#1
3 4 2 1
输入#2
4 2 1 3 4
输出#2
-1
输入#3
5 2 3 4 5 1
输出#3
4 5 1 2 3