Leetcode Problem 1054. Distant Barcodes

1054. Distant Barcodes

Leetcode Solutions

Frequency Sorting and Two-Pointer Approach

  1. Count the frequency of each barcode using a hash map.
  2. Create a list of barcode-frequency pairs and sort it in descending order of frequency.
  3. Initialize a new array result of the same length as barcodes.
  4. Use two pointers, even and odd, to fill the result array. Start with even at index 0 and odd at index 1.
  5. Iterate over the sorted list of barcode-frequency pairs.
  6. While the frequency of the current barcode is greater than 0:
    • Place the barcode at the even index and increment even by 2.
    • If even exceeds the length of the array, start placing barcodes at the odd index and increment odd by 2.
  7. Return the result array.
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Heap-based Approach

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