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Hackerrank Solution

Context :-
Given a  2D Array, :
1 1 1 0 0 0
0 1 0 0 0 0
1 1 1 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
We define an hourglass in  to be a subset of values with indices falling in this pattern in 's graphical representation:
a b c
  d
e f g
There are  hourglasses in , and an hourglass sum is the sum of an hourglass' values.
Task :-
Calculate the hourglass sum for every hourglass in , then print the maximum hourglass sum.
Note: If you have already solved the Java domain's Java 2D Array challenge, you may wish to skip this challenge.
Input Format :-
There are  lines of input, where each line contains  space-separated integers describing 2D Array ; every value in  will be in the inclusive range of  to .
Output Format : -
Print the largest (maximum) hourglass sum found in .
Sample Input :-
1 1 1 0 0 0
0 1 0 0 0 0
1 1 1 0 0 0
0 0 2 4 4 0
0 0 0 2 0 0
0 0 1 2 4 0
Sample Output
19
Explanation :-
 contains the following hourglasses:
1 1 1   1 1 0   1 0 0   0 0 0
  1       0       0       0
1 1 1   1 1 0   1 0 0   0 0 0

0 1 0   1 0 0   0 0 0   0 0 0
  1       1       0       0
0 0 2   0 2 4   2 4 4   4 4 0

1 1 1   1 1 0   1 0 0   0 0 0
  0       2       4       4
0 0 0   0 0 2   0 2 0   2 0 0

0 0 2   0 2 4   2 4 4   4 4 0
  0       0       2       0
0 0 1   0 1 2   1 2 4   2 4 0
The hourglass with the maximum sum () is:
2 4 4
  2
1 2 4
Solution:- https://docs.google.com/document/d/1ubJR0Dv_bcBAZOF47A87Tzp_QyTt4OT0bFRVWd_xvMw/edit?usp=sharing
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