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project_euler/Problem 40/sol1.py

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