10 lines
268 B
Python
10 lines
268 B
Python
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def multi_in_num(limit, base):
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count = limit // base
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return (count + 1) * count * base // 2
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def dual_multi_in_num(limit, a, b):
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return multi_in_num(limit, a) + multi_in_num(limit, b) - multi_in_num(limit, a * b)
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print(dual_multi_in_num(1000 - 1, 3, 5))
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