1. Given a binary tree print it's vertical order traversal
https://leetcode.com/problems/binary-tree-vertical-order-traversal/
2.Given a 2D matrix consisting of characters - '#', '&', 'S' and 'D'.
S denotes the source, D denotes the destination, & denotes blocked areas and # denotes allowed areas. Find the shortest path from source to destination. UP / DOWN / LEFT / RIGHT moves are allowed.
Example Matrix:-
[['S','#','#'],
['#','&','#'],
['&','#','D']]
Answer:- 4