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Grokking the Coding Interview Patterns in Python

Solution: Single Number

Explore how to find the single number in an array where every other element appears twice by applying bitwise XOR operations. Understand the XOR properties and implement a solution with linear runtime and constant space complexity.

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Statement

Given an array of integers, where every element appears twice except for one, find the element that occurs only once.

Note: The solution must have linear runtime and constant space complexity.

Constraints:

  • 1≤1 \leq nums.length ≤103\leq 10^3
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