SPOJ Problem Set (classical)
5833. XOR Rounds
Problem code: XORROUND

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/ 
