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18 lines
335 B
Python
18 lines
335 B
Python
def f(n):
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bin_n = bin(n)[2:]
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if n % 5 == 0:
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bin_n += bin(5)[2:]
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else:
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bin_n += "1"
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if int(bin_n, 2) % 7 == 0:
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bin_n += bin(7)[2:]
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else:
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bin_n += "1"
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return int(bin_n, 2)
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for i in range(1000, 1000000):
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if f(i) >= 1728404:
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print(i - 1)
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break
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