#include <iostream>
#include <cstdio>
#include<algorithm>
#include <vector>
#include <stdexcept>
#define ll long long
using namespace std;
using namespace std;
int main()
{
    int n, t;
    scanf("%d %d", &n,&t);
    n = 1<<n;
    vector<int> A(n);
    for(int i=0;i<n;i++){
        scanf("%d", &(A[i]));
    }
    if(t%2) {
        int a =0;int b = n-1;
        while(b>a){
            swap(A[a],A[b]);
            a++;b--;
        }
    }
    for(int i=0;i<n;i++)printf("%d ",A[i]);
    printf("\n");
    return 0;
}
        | 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 | #include <iostream> #include <cstdio> #include<algorithm> #include <vector> #include <stdexcept> #define ll long long using namespace std; using namespace std; int main() { int n, t; scanf("%d %d", &n,&t); n = 1<<n; vector<int> A(n); for(int i=0;i<n;i++){ scanf("%d", &(A[i])); } if(t%2) { int a =0;int b = n-1; while(b>a){ swap(A[a],A[b]); a++;b--; } } for(int i=0;i<n;i++)printf("%d ",A[i]); printf("\n"); return 0; } | 
 
            
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