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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. 		double f = 1;
  9. 		double p = 1;
  10. 		Scanner in=new Scanner(System.in);
  11. 		int n = in.nextInt();
  12. 	for(int i = 1; i <= n; i++)
  13. 	{ 
  14. 		f = f * i;
  15. 		p *= ( 1 / f  + 2);
  16. 	}
  17.  System.out.println(p);
  18. 	}
  19. }
  20.  
Success #stdin #stdout 0.14s 321280KB
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7.5
https://ideone.com/JzB87V
language:
Java (12.0.1)
created:
9 years ago
visibility:
secret

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