19 lines
360 B
Python
19 lines
360 B
Python
from util.io import readvalue
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def fibonacci(n):
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if(n in (0,1)):
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return 1
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return fibonacci(n - 1) + fibonacci(n - 2)
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if( __name__ == "__main__"):
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def nonnegative_int(s):
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i = int(s)
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if(i < 0):
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raise ValueError("{} is smaller than zero".format(i))
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return i
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n = readvalue("n > ", nonnegative_int)
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print("fibonacci(", n, ") = ", fibonacci(n))
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