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Leetcode Problem 645. Set Mismatch

645. Set Mismatch

Leetcode Solutions

Using XOR

  1. Compute xor by XORing all numbers from 1 to n and all elements in the array.
  2. Find the rightmost bit that is set in xor (different bit between x and y).
  3. Partition the numbers into two groups based on the rightmost set bit.
  4. XOR all numbers in each group to find x and y.
  5. Iterate over the array to determine which one is the duplicate and which one is missing.
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Using Sorting

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