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  1. import java.util.*;class A{static int[]P(int n){int[]U=new int[(int)Math.pow(2,n)];for(int i=0;i<U.length;i++){String Q=new String(Integer.toBinaryString(i));if(Q.length()<n){Q=new String(new char[n-Q.length()]).replace("\0","0")+Q;}U[i]=Integer.parseInt(new StringBuilder(Q).reverse().toString(),2);}return U;}public static void main(String[]a){System.out.print(Arrays.toString(P(new Scanner(System.in).nextInt())));}}
Success #stdin #stdout 0.13s 321280KB
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[0, 4, 2, 6, 1, 5, 3, 7]
https://ideone.com/fy1xGj
language:
Java (12.0.1)
created:
7 years ago
visibility:
public

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