1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
#include <algorithm>
#include <cstdint>
#include <iostream>

#define N(x) (1 << x)

int main(void) {
	int64_t n, t;

	scanf("%lld %lld", &n, &t);

	int64_t a[N(n)];

	for (size_t i = 0; i < N(n); i++)
		scanf("%lld", &a[i]);

	if (t % 2 == 1)
		for (size_t i = N(n) - 1; i != -1; i--)
			printf("%lld ", a[i]);
	else
		for (size_t i = 0; i < N(n); i++)
			printf("%lld ", a[i]);

	return 0;
}