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26 lines
707 B
Python
26 lines
707 B
Python
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#-.- coding: latin-1 -.-
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from __future__ import print_function
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'''
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Champernowne's constant
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Problem 40
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An irrational decimal fraction is created by concatenating the positive integers:
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0.123456789101112131415161718192021...
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It can be seen that the 12th digit of the fractional part is 1.
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If dn represents the nth digit of the fractional part, find the value of the following expression.
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d1 × d10 × d100 × d1000 × d10000 × d100000 × d1000000
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'''
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constant = []
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i = 1
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while len(constant) < 1e6:
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constant.append(str(i))
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i += 1
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constant = ''.join(constant)
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print(int(constant[0])*int(constant[9])*int(constant[99])*int(constant[999])*int(constant[9999])*int(constant[99999])*int(constant[999999]))
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