Project Euler
Problem 40: Champernowne's Constant

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


Runtime: 0
Average: 0 Runs: 0
SD: 0 ms
Max: 0
Min: 1000

The trick to this solution is finding the nth digit. The key to that is figuring out which number is represented by each digit so you need a slightly different process based on that. Once the awkward math is worked out it's just a quick number crunch.

79,882