Have you ever noticed that
,
,
and
have
holes
in them?
An interesting problem is to count such holes in a given number.
For example, the number and have and holes respectively.
Counting the holes in relatively small numbers are pretty easy, but how about finding the holes in a 500 digits number?
How many holes are there in the 500-digits number?
You can find the number here .
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Finding holes in a 500 digits number is also pretty easy #_#
Python Solution: