Dear All,

Increasing integers can be defined as each of their digits is not greater
than the digit to the right, and integers for which each digit is not lesser
than the digit to the right as decreasing integers. For example 24558 is
increasing, 888410 is decreasing and 5 - is both increasing and decreasing.

Given *n *(no of digits) how to calculate the number of the decreasing
*n*-digit
integers to the increasing *n*-digit integers.

For example:
n=2
inc. intergers = 45
dec. intergers = 54

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