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  1. #include <stdio.h>
  2. int fib1(int n) {
  3. 	int f=0,e=1,d=0;
  4. 	if(n==0)return 0;
  5. 	else if(n==1)return 1;
  6. 	else
  7. 	for(int i=2;i<=n;i++){
  8. 		f=e+d;
  9. 		d=e;
  10. 		e=f;
  11. 	}
  12. 	return f;
  13. }
  14. int main(void) {
  15. 	int n;
  16. 	scanf("%d",&n);
  17. 	printf("%d",fib1(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/TWzWtm
language:
C99 (gcc 8.3)
created:
3 days ago
visibility:
public

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