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| def factorial(n): | |
| if n == 0: return 1 | |
| else: return factorial(n-1) * n | |
| def tail_factorial(n, accumulator=1): | |
| if n == 0: return accumulator | |
| else: return tail_factorial(n-1, accumulator * n) |
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I think line 6 should be
return accumulator, you can pull in my fix