XORROUND  XOR Rounds
You are given a cyclic array A having N numbers. In an XOR round, each element of the array A is replaced by the bitwise XOR (Exclusive OR) of itself, the previous element, and the next element in the array. All operations take place simultaneously. Can you calculate A after K such XOR rounds ?
Input
The first line contains the number of test cases T (T <= 50).
There follow 2T lines, 2 per test case. The first line contains two space seperated integers N (3 <= N <= 500) and K (1 <= K <= 1000000000). The next line contains N space seperated integers Ai (0 <= Ai <= 1000000000), which are the initial values of the elements in array A.
Output
Output T lines, one per test case. For each test case, output a space seperated list of N integers, specifying the contents of array A after K XOR rounds.
Example
Sample Input :
2
3 1
1 2 3
5 100
1 11 111 1111 11111
Sample Output :
0 0 0
11117 101 1075 12127 12081
Added by:  Varun Jalan 
Date:  20100111 
Time limit:  4s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel Pentium G860 3GHz) 
Languages:  All except: NODEJS PERL 6 SCM chicken VB.net 
Resource:  Own Problem, used for Codechef Snackdown http://www.codechef.com/ 
hide comments
Ankit Sultana:
20150520 21:45:55
A really good problem!! 

anurag garg:
20140114 19:04:21
My 200th on spoj.....bits logic Last edit: 20140115 17:22:59 