https://github.com/arjun1237/diagonaldifference
https://github.com/arjun1237/diagonaldifference
Last synced: 4 months ago
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- Host: GitHub
- URL: https://github.com/arjun1237/diagonaldifference
- Owner: arjun1237
- Created: 2018-08-14T23:43:04.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2018-08-14T23:47:47.000Z (over 7 years ago)
- Last Synced: 2025-01-09T05:00:42.872Z (about 1 year ago)
- Language: Java
- Size: 2.93 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# DiagonalDifference
Problem is from link: https://www.hackerrank.com/challenges/diagonal-difference/problem
Given a square matrix, calculate the absolute difference between the sums of its diagonals.
For example, the square matrix is shown below:
1 2 3
4 5 6
9 8 9
The left-to-right diagonal = . The right to left diagonal = . Their absolute difference is .
Function description
Complete the function in the editor below. It must return an integer representing the absolute diagonal difference.
diagonalDifference takes the following parameter:
arr: an array of integers .
Input Format
The first line contains a single integer, , the number of rows and columns in the matrix .
Each of the next lines describes a row, , and consists of space-separated integers .
Constraints
Output Format
Print the absolute difference between the sums of the matrix's two 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
Note: |x| is the absolute value of x