message: Added proper comments to solution.cpp
diff: // Link to Ques: https://www.interviewbit.com/problems/remove-duplicates-from-sorted-array-ii/
  +// Using 2 pointers to keep track of indexes within which a number lies.
  +// If difference b/w indexes(i & j) is more than 2,
  +// leave behind first 2 numbers & erase the rest from given vector
  int Solution::removeDuplicates(vector<int> &A) {
  int n = A.size();
  if(A.size() == 0 || A.size() == 1){
  