22 lines
333 B
Python
22 lines
333 B
Python
a = [0, 1, 2]
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dic = {(2, 1): 1}
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maxx = 100
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from sys import argv
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if len(argv) > 0:
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maxx = int(argv[1])
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def get(x, y):
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if y >= x:
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return a[x]
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return dic.get((x, y))
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for n in xrange(3, maxx + 1):
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tmp = 0
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for i in xrange(1, n):
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tmp += get(n - i, i)
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dic.update({(n, i): tmp})
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a.append(tmp + 1)
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print a[-1] - 1
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