Leetcode Problem 2505. Bitwise OR of All Subsequence Sums

2505. Bitwise OR of All Subsequence Sums

Leetcode Solutions

Prefix Sum and Bitwise OR

  1. Initialize a variable result to 0, which will store the final bitwise OR of all subsequence sums.
  2. Initialize a variable prefix_sum to 0, which will store the running sum of elements.
  3. Iterate through each element num in the array nums. a. Update prefix_sum by adding the current element num to it. b. Perform a bitwise OR operation between result and num, and store the result back in result. c. Perform a bitwise OR operation between result and prefix_sum, and store the result back in result.
  4. After the loop, return result as the final answer.
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Count Each Bit

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