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 n, t, nthPowerOfTwo;
const int MAX_N = 1<<21;
int tab[MAX_N];

int main() {
  ios_base::sync_with_stdio(0);
  // cout << MAX_N << endl;
  cin >> n >> t;
  nthPowerOfTwo = 1<<n;
  // cout << nthPowerOfTwo;
  for (int i = 0; i < nthPowerOfTwo; ++i) {
    cin >> tab[i];
  }
  if (t % 2 == 0) {
    cout << tab[0];
    for (int i = 1; i < nthPowerOfTwo; ++i) {
      cout << " " << tab[i];
    }
  }
  else {
    cout << tab[nthPowerOfTwo - 1];
    for (int i = nthPowerOfTwo - 2; i >= 0; --i) {
      cout << " " << tab[i];
    }
  }

  cout << endl;
}