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  1. #include <stdio.h>
  2.  
  3. int foo(int n,int r)
  4. {
  5. 	if(n==r) return 1;
  6. 	if(r==1) return n;
  7. 	return foo(n-1,r) + foo(n-1,r-1);
  8. }
  9.  
  10. int main()
  11. {
  12. 	int n,r;
  13. 	scanf("%d %d",&n,&r);
  14.  
  15. 	printf("%d",foo(n,r));
  16. 	return 0;
  17. }
Success #stdin #stdout 0.01s 1680KB
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https://ideone.com/KIUbg
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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