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  1.  
  2. import java.util.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. import java.math.BigInteger;
  7.  
  8.  
  9. class Ideone
  10. {
  11. 	public static BigInteger pow_2 (int n)
  12.     {
  13.         String binary = "1";
  14.         for (int i=0; i<n; i++) binary += "0";
  15.         return new BigInteger(binary, 2); 
  16.     }
  17.  
  18. 	public static void main (String[] args) throws java.lang.Exception
  19. 	{
  20. 		System.out.println(pow_2(10).toString());
  21. 	}
  22. }
Success #stdin #stdout 0.07s 380224KB
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1024
https://ideone.com/wWmGsu
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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