Solution: Find Pivot Index
Explore how to find the pivot index where the sum of elements to the left equals the sum to the right in an integer array. Understand the efficient solution using running sums that avoids recalculating at each step, achieving linear time complexity and constant space usage. This lesson helps you implement and reason about optimal tracking techniques for balance problems.
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Statement
Given an integer array nums, find the pivot index of the array.
The pivot index is defined as the index where the sum of all elements strictly to its left equals the sum of all elements strictly to its right. If the index lies on the left edge of the array, the left sum is considered
Return the leftmost pivot index. If no such index exists, return
Constraints:
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