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24 lines
381 B
Python
24 lines
381 B
Python
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def fifth_n(n, k):
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s = ""
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while n:
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s += str(n % 5)
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n //= 5
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s = s[::-1]
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return s[k]
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def f(n):
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bin_n = bin(n)[2:]
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if bin_n.count("0") % 2 == 0:
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n = fifth_n(n, 0) + str(n)
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else:
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n = str(n) + fifth_n(n, 0)
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return sum(list(map(int, bin(int(n))[2:])))
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m = []
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for i in range(100, 501):
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m.append(f(i))
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print(max(m))
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