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  1. #include <stdio.h>
  2.  
  3. 	int fib1(int n) {
  4.      	int i,f;
  5.         int fa=1;
  6. 		int fb=0;            
  7.  
  8. 		if(n==0) return 0;
  9.  		else if(n==1) return 1;
  10. 	    else{
  11.        	 for(i=2;i<=n;i++){
  12.     		f = fa + fb ;
  13.         	fb=fa;
  14.        	    fa=f;
  15. 		}
  16.    return f;	
  17. 	}
  18. }
  19.  
  20.  
  21.  
  22.  
  23. 	int main(void) {
  24. 		int n;
  25.  	    scanf("%d",&n);
  26.         printf("%d",fib1(n));
  27. 		return 0;
  28. }
  29.  
Success #stdin #stdout 0.01s 5288KB
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stdin 
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stdout 
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https://ideone.com/45msyJ
language:
C (gcc 8.3)
created:
15 days ago
visibility:
public

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