Time limit
2s
Memory limit
128 MB
You are given an integer N such that N=2k and 1≤k≤10. Then 2N−1 integers are given.
Choose exactly N of the given numbers so that the sum of the chosen numbers is divisible by N. Print the chosen N numbers. If several answers are possible, print any one of them.
The first line contains N.
The second line contains 2N−1 integers. Each integer is between 0 and 1000, inclusive.
On the first line, print N numbers separated by spaces whose sum is divisible by N.
If several answers are possible, print any one of them. If no such selection exists, print -1.