public class Solution
extends Object
967 - Numbers With Same Consecutive Differences\.
Medium
Return all **non-negative** integers of length `n` such that the absolute difference between every two consecutive digits is `k`.
Note that **every** number in the answer **must not** have leading zeros. For example, `01` has one leading zero and is invalid.
You may return the answer in **any order**.
**Example 1:**
**Input:** n = 3, k = 7
**Output:** [181,292,707,818,929]
**Explanation:** Note that 070 is not a valid number, because it has leading zeroes.
**Example 2:**
**Input:** n = 2, k = 1
**Output:** [10,12,21,23,32,34,43,45,54,56,65,67,76,78,87,89,98]
**Constraints:**
* `2 <= n <= 9`
* `0 <= k <= 9`