308403: CF1513C. Add One
Memory Limit:256 MB
Time Limit:1 S
Judge Style:Text Compare
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Description
Add One
题意翻译
称“将一个数上每一位的值$+1$”为一次操作,例如对于$93$进行一次操作后的结果为$104$。输入$n,m$,输出对$n$进行$m$次操作的结果。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 $ .输入输出格式
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.
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
输入样例 #1
5
1912 1
5 6
999 1
88 2
12 100
输出样例 #1
5
2
6
4
2115