1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
#include <iostream>
#include <cstdio>
using namespace std;

int n, t, tab[2000100];
//************************************************************
int main()
{
	scanf("%d%d", &n, &t);

	for (int i = 0; i < (1<<n); i++)
		scanf("%d", &tab[i]);

	if (t % 2 == 0)
		for (int i = 0; i < (1<<n); i++)
			printf("%d ", tab[i]);
	else
		for (int i = (1<<n)-1; i >= 0; i--)
			printf("%d ", tab[i]);

	printf("\n");
}