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Grokking the Coding Interview Patterns in C#

Solution: Single Number II

Explore how to solve the problem of finding two unique elements in an array where all others appear twice by applying bitwise XOR manipulation in C#. Understand the algorithm to separate elements by set bits and achieve a solution with linear time and constant space complexity.

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Statement

Given a non-empty array arr, in which exactly two elements appear once, and all the other elements appear twice, return the two elements that appeared only once.

Note: The result can be returned in any order. The solution should use only constant extra space.

Constraints:

  • 2≤2 \leq arr.length ≤103\leq 10^3

  • ...