Write a program to calculate the sum of the border elements of a hardcoded 2D matrix.

Medium

Matrix:
[ [1, 2, 3],
 [4, 5, 6],
 [7, 8, 9] ]

Border Sum: 40

Time: 2s · Memory: 256 MB

Code Editor

00:00

using System; class BorderSum { static void Main() { // Calculate the sum of border elements in the matrix } }

Input

Matrix:
[ [1, 2, 3],
 [4, 5, 6],
 [7, 8, 9] ]

Expected Output

Border Sum: 40

Custom Input (stdin)

Program Output

> Run your code to see console output.

Programming Exercises