fork download
copy 
  1. #include<stdio.h>
  2. int rec(int n){
  3. 	int a=1;
  4. 	int b=3;
  5. 	int c;
  6. 	if(n==1){
  7. 		return 1;
  8. 	}
  9. 	if(n==2){
  10. 		return 3;
  11. 	}
  12. 	for(int i=3;i<n;i++){
  13. 		c=2*b+a;
  14. 		a=b;
  15. 		b=c;
  16. 	}
  17. 	return c;
  18. }
  19.  
  20. int main(void){
  21. 	int i=5;
  22. 	int result=rec(5);
  23. 	printf("%d", result);
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
17
https://ideone.com/mDfpS1
language:
C (gcc 8.3)
created:
6 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!