A14214 | Add One
时间限制1s
内存限制256MB
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题目描述
You are given an integer $n$ . You have to apply $m$ operations to it.
In a single operation, you must replace every digit $d$ of the number with the decimal representation of integer $d + 1$ . For example, $1912$ becomes $21023$ after applying the operation once.
You have to find the length of $n$ after applying $m$ operations. Since the answer can be very large, print it modulo $10^9+7$ .
In a single operation, you must replace every digit $d$ of the number with the decimal representation of integer $d + 1$ . For example, $1912$ becomes $21023$ after applying the operation once.
You have to find the length of $n$ after applying $m$ operations. Since the answer can be very large, print it modulo $10^9+7$ .
输入格式
The first line contains a single integer $t$ ( $1 \le t \le 2 \cdot 10^5$ ) — the number of test cases.
The only line of each test case contains two integers $n$ ( $1 \le n \le 10^9$ ) and $m$ ( $1 \le m \le 2 \cdot 10^5$ ) — the initial number and the number of operations.
The only line of each test case contains two integers $n$ ( $1 \le n \le 10^9$ ) and $m$ ( $1 \le m \le 2 \cdot 10^5$ ) — the initial number and the number of operations.
输出格式
For each test case output the length of the resulting number modulo $10^9+7$ .
输入输出样例
输入 #1
5 1912 1 5 6 999 1 88 2 12 100
输出 #1
5 2 6 4 2115
For the first test, $1912$ becomes $21023$ after $1$ operation which is of length $5$ .
For the second test, $5$ becomes $21$ after $6$ operations which is of length $2$ .
For the third test, $999$ becomes $101010$ after $1$ operation which is of length $6$ .
For the fourth test, $88$ becomes $1010$ after $2$ operations which is of length $4$ .
For the second test, $5$ becomes $21$ after $6$ operations which is of length $2$ .
For the third test, $999$ becomes $101010$ after $1$ operation which is of length $6$ .
For the fourth test, $88$ becomes $1010$ after $2$ operations which is of length $4$ .
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评测结果：Accepted