How to Solve Find the X O R of Numbers Which Appear Twice Problem
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Find the XOR of Numbers Which Appear Twice
You are given an array nums, where each number in the array appears either once or twice. Return the bitwise XOR of all the numbers that appear twice in the array, or 0 if no number appears twice.
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Understanding the Find the X O R of Numbers Which Appear Twice Problem
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Problem Statement
You are given an array nums, where each number in the array appears either once or twice. Return the bitwise XOR of all the numbers that appear twice in the array, or 0 if no number appears twice.
Find the XOR of Numbers Which Appear Twice
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Examples
nums = [1,2,1,3]1The only number that appears twice in nums is 1.
nums = [1,2,3]0No number appears twice in nums.
nums = [1,2,2,1]3Numbers 1 and 2 appeared twice. 1 XOR 2 == 3.
Constraints
1 <= nums.length <= 501 <= nums[i] <= 50Each number in nums appears either once or twice.How Interview Coder Helps with Leetcode Problems
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