You are given an array of $n$ integers. Your task is to calculate the bitwise or of each window of $k$ elements, from left to right.
In this problem the input data is large and it is created using a generator.
The first line contains two integers $n$ and $k$ : the number of elements and the size of the window.
The next line contains four integers $x$ , $a$ , $b$ and $c$ : the input generator parameters. The input is generated as follows:
Print the xor of all window ors.
8 5 3 7 1 11· \n · · · \n
4\n
The input array is $[3,0,1,8,2,4,7,6]$ . The windows are $[3,0,1,8,2]$ , $[0,1,8,2,4]$ , $[1,8,2,4,7]$ and $[8,2,4,7,6]$ , and their ors are $11$ , $15$ , $15$ and $15$ . Thus, the answer is $11 \oplus 15 \oplus 15 \oplus 15 = 4$ .