Leetcode Problem 724. Find Pivot Index

724. Find Pivot Index

Leetcode Solutions

Prefix Sum Approach

  1. Calculate the total sum S of the array nums.
  2. Initialize leftsum to 0.
  3. Iterate through the array from index 0 to the end. a. For each index i, calculate the right sum as S - nums[i] - leftsum. b. If leftsum equals the right sum, return the current index i as the pivot index. c. Update leftsum by adding nums[i] to it.
  4. If no pivot index is found during the iteration, return -1.
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Brute Force Approach

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