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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		int n = 1235;
  13. 		int x = 123;
  14. 		long time = System.nanoTime();
  15. 		System.out.println(power(n,x) + " Time: " + (System.nanoTime()- time));
  16.  
  17. 		time = System.nanoTime();
  18. 		System.out.println(Math.pow(n,x)  + " Time: " + (System.nanoTime()- time));
  19. 	}
  20. 	public static long power(long n, int x){
  21. 	 	long pow = 1;
  22. 	 	long exp = n;
  23. 		while(x>0){
  24. 			if((x & 1) == 1){
  25. 				pow*=exp;
  26. 			}
  27. 			exp*= exp;
  28. 			x = x>>1;
  29. 		}
  30. 		return pow;
  31. 	}
  32. }
Success #stdin #stdout 0.07s 380224KB
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-8356899175023020885 Time: 84073
Infinity Time: 1262488
https://ideone.com/k6RJ1a
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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