Solution: Find Pivot Index
Explore how to identify the pivot index in an integer array by efficiently tracking left and right sums. This lesson teaches a single-pass O(n) approach using total sum and running left sum to find the leftmost pivot index. By the end, you'll understand the solution's logic and its time and space complexity benefits.
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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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