Diagonal Difference
Solution
public static int diagonalDifference(List<List<int>> arr)
{
int d1=0,d2=0;
int count=arr.Count;
for(int i=0;i<=arr.Count-1;i++)
{
for(int j=0;j<=arr[i].Count-1;j++)
{
if(i==j)
{
d1+=arr[i][j];
}
if(i==count-j-1)
{
d2+=arr[i][j];
}
}
}
return Math.Abs(d1-d2);
}
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