Leetcode Problem 442. Find All Duplicates in an Array

442. Find All Duplicates in an Array

Leetcode Solutions

Initialize an empty list to store the duplicates.
Iterate over each element x in the array.
Calculate the index idx as abs(x) - 1.
If the element at nums[idx] is positive, negate it to mark that the number x has been seen.
If the element at nums[idx] is already negative, it means x has been seen before, so add abs(x) to the list of duplicates.
Return the list of duplicates.

Programming Language

Purpose:

General Question

Debug My Code

image/screenshot of info(optional)

Full Screen