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  1. #include <stdio.h>
  2. int tetra(int n){
  3. 	switch(n){
  4. 		case 0:
  5. 		case 1:
  6. 		case 2:
  7. 		return 0;
  8. 		case 3:
  9. 		return 1;
  10. 		default:
  11. 		return tetra(n-1)+tetra(n-2)+tetra(n-3)+tetra(n-4);
  12. 	}
  13. }
  14. int main(void) {
  15. 	int n;
  16. 	scanf("%d",&n);
  17. 	printf("%d",tetra(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5288KB
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https://ideone.com/MpBJpW
language:
C (gcc 8.3)
created:
53 days ago
visibility:
public

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