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  1. #include <stdio.h>
  2.  
  3. long f3(int n){
  4. 	long f;
  5. 	if(n==0){
  6. 	f=0;
  7. 	}
  8. 	else if(n==1){
  9. 	 f=1;	
  10. 	}
  11. 	else if(n==2){
  12. 	f=2;	
  13. 	}
  14. 	else{
  15. 	f=f3(n-1)+f3(n-2)+f3(n-3);	
  16. 	}
  17. 	return f;
  18. }
  19.  
  20.  
  21.  
  22.  
  23. int main()
  24. {
  25. 	int n,a;
  26. 	scanf("%d",&n);
  27. 	a=f3(n);
  28. 	printf("%d",a);
  29.  
  30.        return 0;
  31. }
  32.  
Success #stdin #stdout 0.01s 5292KB
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stdout
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https://ideone.com/pOOILE
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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