Xor Pyramid Row

Consider a xor pyramid where each number is the xor of lower-left and lower-right numbers. Here is an example pyramid: Given the bottom row of the pyramid, your task is to find the numbers on the k-th row from the top. Input The first line has two integers n and k: the size of the pyramid and the given row. The next line has n integers a_1,a_2,\dots,a_n: the bottom row of the pyramid. Output