Explanation: Total number of unique elements are 3, i.e[1,2,3] and Therefore return 3 after assigning [1,2,3] in the beginning of the array. Explanation: Total number of unique elements are 4, i.e[1,2 ...

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Your function should return length = 5, with the first five elements of nums being 1, 1, 2, 2 and 3. It doesn't matter what you leave beyond the new length ...

Duplicate photos on an iPhone can take up valuable storage space, making it essential to remove them to free up memory. You can delete duplicates manually or use specialized tools. Here’s how to ...