Question: I do not understand, Please help! 2. Programming Question Easy #1 Given a non-empty list of integers, where every element appears twice except for one.

I do not understand, Please help! 2. Programming Question Easy #1

I do not understand, Please help!

2. Programming Question Easy #1 Given a non-empty list of integers, where every element appears twice except for one. Print the element that appears once. For example: Example 1 : Input: [2,2,1] Output: The number 1 appears only once Example 2: Input: [4,1,2,1,2] Output: The number 4 appears only once

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