#include <bits/stdc++.h>
using namespace std;
int n, t, arr[1<<21], n2;
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin>>n>>t;
	n2=pow(2,n);
	if (t%2==0){
		for(int i=0;i<n2;i++){
			cin>>arr[0];
			cout<<arr[0]<<" ";
		}
	}
	else{
		for(int i=0;i<n2;i++){
			cin>>arr[i];
		}
		for(int i=n2-1;i>=0;i--){		
			cout<<arr[i]<<" ";
		}
}
	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 | #include <bits/stdc++.h> using namespace std; int n, t, arr[1<<21], n2; int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cin>>n>>t; n2=pow(2,n); if (t%2==0){ for(int i=0;i<n2;i++){ cin>>arr[0]; cout<<arr[0]<<" "; } } else{ for(int i=0;i<n2;i++){ cin>>arr[i]; } for(int i=n2-1;i>=0;i--){ cout<<arr[i]<<" "; } } return 0; } | 
 
            
         English
                    English