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  1. #include <stdio.h>
  2. int a(int n,int r){
  3. 	if(r==0){
  4. 		return 1;
  5. 	}
  6. 	else if(r==n){
  7. 		return 1;
  8. 	}
  9. 	else if(r==1){
  10. 		return n;
  11. 	}
  12. 	else{
  13. 		return a(n-1,r-1)+a(n-1,r);
  14. 	}
  15. }
  16. int main(void) {
  17. 	int n=4,r=2;
  18. 	printf("%d", a(n,r));
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5312KB
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6
https://ideone.com/k0UQLU
language:
C (gcc 8.3)
created:
11 hours ago
visibility:
public

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