1
 2
 3
 4
 5
 6
 7
 8
 9
10
#include<cstdio>
int n,t, c[2000000];
int main()
{
	scanf("%d%d", &n, &t);
	for(int i=0; i<(1<<n); i++)scanf("%d", &c[i]);
	if(t%2==0)for(int i=0; i<(1<<n); i++)printf("%d ", c[i]);
	else for(int i=(1<<n)-1; i>=0; i--)printf("%d ", c[i]);
	return 0;
}