A program was supposed to print an array of integers. The program forgot to print
whitespaces and the array is printed as a string of digits and all we know is that all
integers in the array were in the range [1, k] and there are no
leading zeros in the array.
Given the string s and the integer k. There can be multiple
ways to restore the array.
Return the number of possible array that can be printed as a string
s using the mentioned program.
The number of ways could be very large so return it modulo 10^9
+ 7
Example 1:
Input: s = "1000", k = 10000 Output: 1 Explanation: The only possible array is [1000]
Example 2:
Input: s = "1000", k = 10 Output: 0 Explanation: There cannot be an array that was printed this way and has all integer >= 1 and <= 10.
Example 3:
Input: s = "1317", k = 2000 Output: 8 Explanation: Possible arrays are [1317],[131,7],[13,17],[1,317],[13,1,7],[1,31,7],[1,3,17],[1,3,1,7]
Example 4:
Input: s = "2020", k = 30 Output: 1 Explanation: The only possible array is [20,20]. [2020] is invalid because 2020 > 30. [2,020] is ivalid because 020 contains leading zeros.
Example 5:
Input: s = "1234567890", k = 90 Output: 34
Constraints:
1 <= s.length <= 10^5.s consists of only digits and doesn't contain leading zeros.1 <= k <= 10^9.