2553. Separate the Digits in an Array
Description
Given an array of positive integers nums
, return an array answer
that consists of the digits of each integer in nums
after separating them in the same order they appear in nums
.
To separate the digits of an integer is to get all the digits it has in the same order.
- For example, for the integer
10921
, the separation of its digits is[1,0,9,2,1]
.
Example 1:
Input: nums = [13,25,83,77] Output: [1,3,2,5,8,3,7,7] Explanation: - The separation of 13 is [1,3]. - The separation of 25 is [2,5]. - The separation of 83 is [8,3]. - The separation of 77 is [7,7]. answer = [1,3,2,5,8,3,7,7]. Note that answer contains the separations in the same order.
Example 2:
Input: nums = [7,1,3,9] Output: [7,1,3,9] Explanation: The separation of each integer in nums is itself. answer = [7,1,3,9].
Constraints:
1 <= nums.length <= 1000
1 <= nums[i] <= 105
Solutions
Solution 1: Simulation
Split each number in the array into digits, then put the split numbers into the answer array in order.
The time complexity is $O(n \times \log_{10} M)$, and the space complexity is $O(n \times \log_{10} M)$. Where $n$ is the length of the array $nums$, and $M$ is the maximum value in the array $nums$.
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