fork(1) download 
  1. count = 0
  2.  
  3. def choose(n,k):
  4. 	global count
  5. 	count += 1
  6. 	if k <= 0:
  7. 		return 1
  8. 	elif n < k:
  9. 		return 0
  10. 	else:
  11. 		return (n + 1 - k)*choose(n, k-1)/k
  12.  
  13. print "answer: ", choose(500,2)
  14. print "function calls: ", count
Success #stdin #stdout 0.01s 7896KB
comments (?)
stdin 
Standard input is empty
stdout 
answer:  124750
function calls:  3
https://ideone.com/yzDd3P
language:
Python (cpython 2.7.16)
created:
11 years ago
visibility:
public

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