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* Pyupgrade to Python 3.9
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34 lines
659 B
Python
34 lines
659 B
Python
"""
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Project Euler Problem 1: https://projecteuler.net/problem=1
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Multiples of 3 and 5
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If we list all the natural numbers below 10 that are multiples of 3 or 5,
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we get 3, 5, 6 and 9. The sum of these multiples is 23.
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Find the sum of all the multiples of 3 or 5 below 1000.
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"""
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def solution(n: int = 1000) -> int:
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"""
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Returns the sum of all the multiples of 3 or 5 below n.
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>>> solution(3)
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0
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>>> solution(4)
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3
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>>> solution(10)
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23
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>>> solution(600)
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83700
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>>> solution(-7)
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0
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"""
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return sum(e for e in range(3, n) if e % 3 == 0 or e % 5 == 0)
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if __name__ == "__main__":
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print(f"{solution() = }")
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