old_contents: 1. K closest points:
    Find the K closest points to the origin in a 2D plane, given an array containing N points.
  2.Maximum Sum/Production Subarray 
  3.Pow(x,n)
  4 Text Justification
  5.Valid Number
  6.Implement List/Stack/MaP
  7.Isomorphic
  8.Implement Read/Write Lock for HashMap/Buffer/etc
  
  
new_contents: 1. K closest points:
    Find the K closest points to the origin in a 2D plane, given an array containing N points.
  2.Maximum Sum/Production Subarray --> Check the answer in Array/
  3.Pow(x,n)
  4 Text Justification
  5.Valid Number
  6.Implement List/Stack/MaP
  7.Isomorphic
  8.Implement Read/Write Lock for HashMap/Buffer/etc
  
  
subject: Update Linkedin0321.py