export function findPivot(nums: number[]): number {
  const total = nums.reduce((a, b) => a + b, 0);
  let leftSum = 0;

  for (let i = 0; i < nums.length; i++) {
    const rightSum = total - leftSum - nums[i];

    if (leftSum === rightSum) {
      return i;
    }

    leftSum += nums[i];
  }

  return -1;
}