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  1. #include <stdio.h>
  2. int main()
  3. {
  4. 	int n, n1=0, n2=1, n3;
  5. 	scanf("%d", &n);
  6. 	if(n==1)
  7. 	{
  8. 		printf("0");
  9. 	}
  10. 	else if(n==2)
  11. 	{
  12. 		printf("1");
  13. 	}
  14. 	else
  15. 	{
  16. 		for(int i=2; i<=n; i++)
  17. 		{
  18. 			n3=n2+n1;
  19. 			n1=n2;
  20. 			n2=n3;
  21. 		}
  22. 		printf("%d", n2);
  23. 	}
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/e7058R
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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