Find Duplicate Numbers from an Integer Array

Duplicate Numbers in Integer Array

In this article, I'll share how you can find out all the duplicate numbers from an integer array.

Without wasting any time let's dive into the solution:

You can easily solve this problem using two nested for loops but it will take O(n^2) time to perform. To solve this problem efficiently you can use extra space.

Here is the solution:

Now let's look at some common methods:

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To solve more problems please check out this article "Top 10 Array Interview Questions".

All the Best!