Find Pivot Index
Updated Feb 24, 2026
Problem
Return index where left sum equals right sum, else -1.
Constraints
1 <= nums.length <= 10^4
Examples
Example 1
Input:
{"nums": [1, 7, 3, 6, 5, 6]}
Output:
3
Function Signature
def pivotIndex(self, nums: list[int]) -> int
How to Submit
Implement a Solution class with a pivotIndex method.
Your method will be called with the input parameters and should return the answer.