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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>

using namespace std;

template <class it>
void tasuj(it first, it last)
{
    if (last-first == 2) {
        swap (*first, *(first+1));
    }else    {
        it mid = first + (last-first)/2;
        swap_ranges(first,mid,mid);
        tasuj(first,mid);
        tasuj(mid,last);
    }
}


int main(int argc, char *argv[])
{

    std::ios::sync_with_stdio(false);
    int n, t;
    vector <int> tab;

    cin>>n>>t;

    tab.resize(1<<n);

    for (int i=0;i<(1<<n);i++)
    {
        cin>>tab[i];
    }

    if (t%2==1)
        reverse(begin(tab),end(tab));

    for (int i=0;i<(1<<n);i++)
    {
        cout<<tab[i]<<" ";
    }
    cout<<endl;

    return 0;
}