Leetcode Problem 898. Bitwise ORs of Subarrays

898. Bitwise ORs of Subarrays

Leetcode Solutions

Frontier Set Approach

  1. Initialize an empty set ans to store all unique bitwise OR results.
  2. Initialize an empty set cur to store unique bitwise OR results of subarrays ending at the current element.
  3. Iterate over each element A[k] in the array: a. Initialize an empty set nextCur. b. Add A[k] to nextCur. c. For each element x in cur, add x | A[k] to nextCur. d. Set cur to nextCur. e. Add all elements of cur to ans.
  4. Return the size of ans as the number of distinct bitwise ORs.
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Brute Force Approach

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