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10 lines
162 B
Python
10 lines
162 B
Python
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def f(n):
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if n < 3:
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return 1
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if n % 2 == 0:
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return 2 * f(n - 1) - f(n - 2)
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return f(n - 1) - 2 * f(n - 2) - 3
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print(f(15))
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