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
26
27
28
29
30
31
32
#include<iostream>

using namespace std;

int main() {
	ios_base::sync_with_stdio(0);
	
	int n, t, s;
	
	cin >> n >> t;
	s = (1 << n);
	
	int a[s];
	
	if (t % 2 == 0) {
		for (int i = 0; i < s; i++) {
			cin >> a[i];
		}
	} else {
		for (int i = s - 1; i >= 0; i--) {
			cin >> a[i];
		}
	}
	
	for (int i = 0; i < s - 1; i++) {
		cout << a[i] << " ";
	}
	
	cout << a[s - 1] << endl;
	
	return 0;
}