This repository will have the code from my YouTube videos about problem solving
Given an array of integers nums.
A pair (i,j) is called good if nums[i] == nums[j] and i < j.
Return the number of good pairs.
Input: nums = [1,2,3,1,1,3]
Output: 4
Explanation: There are 4 good pairs (0,3), (0,4), (3,4), (2,5) 0-indexed.
Input: nums = [1,1,1,1]
Output: 6
Explanation: Each pair in the array are good.
Let me know what other problems would make for a good video to solve