# 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 ...

for row in range(len(arr)-2): for col in range(len(arr)-2): maxSum.append(sum([arr[row][col], arr[row][col+1], arr[row][col+2], arr[row+1][col+1], arr[row+2][col ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...