Leetcode Problem 2044. Count Number of Maximum Bitwise-OR Subsets

2044. Count Number of Maximum Bitwise-OR Subsets

Leetcode Solutions

Recursive Backtracking

  1. Initialize a variable maxOr to 0 and iterate over the array to calculate the maximum bitwise OR value of all elements combined.
  2. Define a recursive function countSubsets that takes the current index, the current bitwise OR value, and a reference to the count of subsets achieving maxOr.
  3. If the current index is out of bounds, check if the current OR value is equal to maxOr. If it is, increment the count.
  4. Call countSubsets recursively twice: once including the current element (updating the current OR value) and once excluding it (keeping the current OR value unchanged).
  5. Invoke countSubsets starting from index 0 and an initial OR value of 0.
  6. Return the count of subsets achieving maxOr.
UML Thumbnail

Iterative Bitmasking

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