class Solution:
  def numGoodPairs(self, nums):
    pairCount = 0
    # TODO: Write your code here
    left, right = 0,0
    while left < len(nums) - 1:
      right += 1
      if nums[left] == nums[right] and left < right:
        pairCount += 1

      if right == len(nums) - 1:
        left += 1
        right = left

    return pairCount