CF1513C.Add One
普及/提高-
通过率:0%
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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 109+7 .
输入格式
The first line contains a single integer t ( 1≤t≤2⋅105 ) — the number of test cases.
The only line of each test case contains two integers n ( 1≤n≤109 ) and m ( 1≤m≤2⋅105 ) — the initial number and the number of operations.
输出格式
For each test case output the length of the resulting number modulo 109+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
说明/提示
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 .