#include <bits/stdc++.h>
using namespace std;
const int N = (1 << 20) + 7;
int n, t;
int a[N];
int main()
{
    scanf("%d%d", &n, &t);
    n = (1 << n);
    for(int i = 0; i < n; i++)
        scanf("%d", &a[i]);
    if(t & 1)
        reverse(a, a + n);
    for(int i = 0; i < n; i++)
        printf("%d ", a[i]);
    return 0;
}
        | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #include <bits/stdc++.h> using namespace std; const int N = (1 << 20) + 7; int n, t; int a[N]; int main() { scanf("%d%d", &n, &t); n = (1 << n); for(int i = 0; i < n; i++) scanf("%d", &a[i]); if(t & 1) reverse(a, a + n); for(int i = 0; i < n; i++) printf("%d ", a[i]); return 0; } | 
 
            
         English
                    English