# https://www.hackerrank.com/challenges/2d-array/problem?h_l=interview&playlist_slugs%5B%5D=interview-preparation-kit&playlist_slugs%5B%5D=arrays for i in range(1 ...

1. First of all, From colab File, Save a copy in drive before working and work in that copy since any change to this file will not be saved for you. 2. You can not use any built-in function except len ...

One of the great flexibilities of Mac OS X is that the built-in Unix underpinnings give users a lot of freedom in developing new ways of accomplishing old tasks. As an example, a new document on Apple ...