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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. 			Scanner sc = new Scanner(System.in); 
  13. 	        int n;
  14. 	        double x;
  15. 	        n = sc.nextInt();
  16.             x = sc.nextInt();	       
  17. 	        double result=0;
  18. 	        for(int i = n; i > 0; i--){
  19. 	        	int j = 1;
  20. 				if((i%2)==0) j = -1;
  21. 				result += j * Math.sin(i * x) / i;
  22. 			}
  23. 			System.out.println(result);
  24. 	}
  25. }
Success #stdin #stdout 0.06s 711680KB
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3 2
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1.194560175080004
https://ideone.com/FapSCS
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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