Watch 10 video solutions for Number of Ways to Separate Numbers, a hard level problem involving String, Dynamic Programming, Suffix Array. This walkthrough by Sahil & Sarra has 656,645 views views. Want to try solving it yourself? Practice on FleetCode or read the detailed text solution.
You wrote down many positive integers in a string called num. However, you realized that you forgot to add commas to seperate the different numbers. You remember that the list of integers was non-decreasing and that no integer had leading zeros.
Return the number of possible lists of integers that you could have written down to get the string num. Since the answer may be large, return it modulo 109 + 7.
Example 1:
Input: num = "327" Output: 2 Explanation: You could have written down the numbers: 3, 27 327
Example 2:
Input: num = "094" Output: 0 Explanation: No numbers can have leading zeros and all numbers must be positive.
Example 3:
Input: num = "0" Output: 0 Explanation: No numbers can have leading zeros and all numbers must be positive.
Constraints:
1 <= num.length <= 3500num consists of digits '0' through '9'.