Solution to the challenge in HackerRank under Algorithms section.
Given a square matrix of size NxN , calculate the absolute difference between the sums of its diagonals.
Input Format
The first line contains a single integer,N . The next N lines denote the matrix's rows, with each line containing N space-separated integers describing the columns.
Constraints
-100<=Elements in the matrix<=100
Output Format
Print the absolute difference between the two sums of the matrix's diagonals as a single integer.
Sample Input
3 11 2 4 4 5 6 10 8 -12 Sample Output
15 Explanation
The primary diagonal is:
11 5 -12 Sum across the primary diagonal: 11 + 5 - 12 = 4
The secondary diagonal is:
4
5 10 Sum across the secondary diagonal: 4 + 5 + 10 = 19 Difference: |4 - 19| = 15