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mogu4iyvs.hakr14

Factorial n!

Use reduce and be Happy!

Code
Diff
  • import functools
def factorial(n: int) -> int:
    """Returns factorial of a non-negative integer."""
    return functools.reduce(lambda a,b: a*b, [i for i in range(2, n + 1)] or [1])
    • import functools
    • def factorial(n: int) -> int:
    • """Returns factorial of a non-negative integer."""
    • return eval("*".join(str(i) for i in range(2, n + 1)) or "1")
    • return functools.reduce(lambda a,b: a*b, [i for i in range(2, n + 1)] or [1])