2639 Separate The Digits In An Array

Separate the Digits in an Array

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

impl Solution {
    pub fn separate_digits(nums: Vec<i32>) -> Vec<i32> {
        let mut arr = Vec::new();

        for k in nums {
            let mut a = k;
            let mut r = Vec::new();
            while(a > 0) {
                r.push(a % 10);
                a = a / 10;
            }
            ;
            for c in r.into_iter().rev() {
                arr.push(c);
            }
        }
        return arr;
    }
}