A14405 | $Digits Sum$

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题目描述

Let's define $S(x)$ to be the sum of digits of number $x$ written in decimal system. For example, $S(5) = 5$ , $S(10) = 1$ , $S(322) = 7$ . We will call an integer $x$ interesting if $S(x + 1) < S(x)$ . In each test you will be given one integer $n$ . Your task is to calculate the number of integers $x$ such that $1 \le x \le n$ and $x$ is interesting.

The first line contains one integer $t$ ( $1 \le t \le 1000$ ) — number of test cases. Then $t$ lines follow, the $i$ -th line contains one integer $n$ ( $1 \le n \le 10^9$ ) for the $i$ -th test case.

Print $t$ integers, the $i$ -th should be the answer for the $i$ -th test case.

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C++ 编辑器

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