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  1. import java.util.Scanner;
  2.  
  3. public class Main
  4. {
  5. 	public static void main (String[] args)
  6. 	{
  7. 		int n, powOf2 = 1;
  8. 		double x, sum = 0;
  9. 		Scanner scanner = new Scanner(System.in);
  10.  
  11. 		n = scanner.nextInt();
  12. 		x = scanner.nextDouble();
  13.  
  14. 		for (int i = 1; i <= n; i++)
  15. 		{
  16. 			powOf2 *= 2;
  17. 			sum += Math.sin(i*x)/powOf2;
  18. 		}
  19.  
  20. 		System.out.println(sum);
  21. 	}
  22. }
Success #stdin #stdout 0.12s 2841600KB
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10
-2.3
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-0.1944212191294577
https://ideone.com/GIynkG
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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