fork download
copy 
  1. #include<stdio.h>
  2. int main()
  3. {
  4. 	int T,N,i,num,a,b;
  5. 	scanf("%d",&T);
  6. 	while(T--)
  7. 	{
  8. 		a=1;
  9. 		b=2;
  10. 		scanf("%d",&N);
  11. 		for(i=3;i<=N;i++)
  12. 		{
  13. 			num=2*b+3*a;
  14. 			a=b;
  15. 			b=num;
  16. 		}
  17. 		if(N==1)	num=a;
  18. 		else if(N==2)	num=b;
  19. 		printf("%d\n",num);
  20. 	}
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 2012KB
comments (?)
stdin
copy 
2
4
7
stdout
copy 
20
547
https://ideone.com/96OnXN
language:
C (gcc 8.3)
created:
8 years 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!