Challenge Diagonal Difference

Question

Given a square matrix of NxN size , 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 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

Note: |x| is absolute value function

Answer 1

https://code.sololearn.com/cQ1O28A971f7/?ref=app

Answer 2

Assume the matrix as mat in C++:

int mdsum=0, mat[50][50], n, m;
for(int*& i : mat)
{ for(int& j : i) cin>>i; }
for(int i=0;i<n;i++)
{ mdsum+=abs(mat[i][i]-mat[i][n-i-1]); }
cout<<mdsum<<endl;