LeetCode 2553: Separate the Digits in an Array Solution

Master LeetCode problem 2553 (Separate the Digits in an Array), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2553. Separate the Digits in an Array

Easy

Array Simulation

Problem Explanation

Explanation

To solve this problem, we need to iterate through each integer in the input array, separate its digits, and then add those separated digits to the output array. We can achieve this by converting each integer to a string, and then iterating over each character in the string to add it to the output array.

Time complexity: O(N * M), where N is the number of integers in the input array and M is the maximum number of digits in any integer.
Space complexity: O(N * M), for the output array where we store separated digits.

Solution Code

class Solution {
    public int[] separateDigits(int[] nums) {
        List<Integer> result = new ArrayList<>();
        
        for (int num : nums) {
            String numStr = String.valueOf(num);
            for (char c : numStr.toCharArray()) {
                result.add(Character.getNumericValue(c));
            }
        }
        
        int[] output = new int[result.size()];
        for (int i = 0; i < result.size(); i++) {
            output[i] = result.get(i);
        }
        
        return output;
    }
}

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Frequently Asked Questions

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What is the time complexity of LeetCode 2553 (Separate the Digits in an Array)?

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