fork download 
  1. #include <stdio.h>
  2.  
  3. int a(int n){
  4.  
  5. 	int an=0,i;
  6.  
  7. 	for(i=0;i<n;i++){
  8.  
  9. 		an=2*an+3;
  10.  
  11. 	}
  12.  
  13. 	return an;
  14. }
  15.  
  16. int main(void) {
  17.  
  18. 	int n;
  19.  
  20. 	scanf("%d",&n);
  21.  
  22. 	printf("%d",a(n));
  23.  
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
2
stdout 
9
https://ideone.com/60lysB
language:
C99 (gcc 8.3)
created:
10 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!