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17 lines
204 B
Python
17 lines
204 B
Python
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def f(n):
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if n == 0:
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return 0
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if n % 2 == 0:
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return f(n / 2) - 1
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return f(n - 1) + 2
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c = 0
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for i in range(1000):
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if f(i) == 3:
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c += 1
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print(c)
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