1416. Restore The Array
Hard
1.5K
48

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 `s` 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`, return the number of the possible arrays that can be printed as `s` using the mentioned program. Since the answer may be very large, return it modulo `109 + 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]
```

Constraints:

• `1 <= s.length <= 105`
• `s` consists of only digits and does not contain leading zeros.
• `1 <= k <= 109`
Accepted
53.8K
Submissions
110.1K
Acceptance Rate
48.9%

Seen this question in a real interview before?
1/4
Yes
No

Discussion (0)

Related Topics