7562: [CSES Problem Set] Counting Numbers
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Description
Your task is to count the number of integers between $a$ and $b$ where no two adjacent digits are the same.
Input
The only input line has two integers $a$ and $b$.
Output
Print one integer: the answer to the problem.
Constraints
$0≤a≤b≤10^{18}$
Sample 1 Input
123 321
Sample 1 Output
171