6959.Xor Pyramid Row

Time Limit: 1s Memory Limit: 512MB

Consider a xor pyramid where each number is the xor of lower-left and lower-right numbers. Here is an example pyramid:

3195-1.png

Given the bottom row of the pyramid, your task is to find the numbers on the $k$ -th row from the top.

Input Format(From the terminal/stdin)

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.

  • $1 \le k \le n \le 2 \cdot 10^5$
  • $1 \le a_i \le 10^9$

Output Format(To the terminal/stdout)

Print $k$ integers: the numbers on the $k$ -th row from the top.

Sample Input

Copy
8 5
2 10 5 12 9 5 1 5
 · \n
 ·  · ·  · · · · \n

Sample Output

Copy
1 10 5 1 8
 ·  · · · \n
Source: CSES, Bitwise Operations, 3195

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