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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) 
  8. 	{
  9. 		int n; //описание переменных
  10. 	    double x;
  11. 	    Scanner sc = new Scanner(System.in);
  12. 	    n = sc.nextInt(); //ввод условий
  13. 	    x = sc.nextDouble();
  14. 	    double sum=0;
  15. 	    double degree=1;
  16. 	    for(int i=1;i<=n;i++)
  17. 	    {
  18. 	        degree=degree*2; //вычисление степеней 2
  19. 	        sum=sum+(x+Math.cos(i*x))/degree; //вычисление суммы
  20. 	    }
  21. 	    System.out.printf("%4.2f\n",sum);
  22. 	}
  23. }
Success #stdin #stdout 0.15s 321344KB
comments (?)
stdin 
5 2
stdout 
1.65
https://ideone.com/0Mhxqv
А116в(Java)
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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