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Leetcode Problem 136. Single Number

136. Single Number

Leetcode Solutions

Bit Manipulation using XOR

  1. Initialize a variable single to 0. This will hold the unique number.
  2. Iterate over each number in the nums array.
  3. Apply XOR operation between single and the current number, and store the result back in single.
  4. After the loop, single will contain the unique number that appears only once.
  5. Return single.
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Hash Table to Track Element Frequencies

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