Counting Pretty Numbers

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Vasya likes the number $239$. Therefore, he considers a number *pretty* if its last digit is $2$, $3$ or $9$. Vasya wants to watch the numbers between $L$ and $R$ (both inclusive), so he asked you to determine how many pretty numbers are in this range. Can you help him? ### Input - The first line of the input contains a single integer $T$ denoting the number of test cases. The description

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solution.cppC++17

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