Find the Element that Appears Once

Teiva Harsanyi
Jun 27, 2020 · 1 min read

Problem

  • Find the only element that appears once
In an unsorted array of integers, every element appears twice except for one element that appears only once. Return this element.Example:Input: a=[1, 4, 2, 4, 1, 3, 2]
Output: 3
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