hackerrank 2darr

hourglass.cs

 public static int maxHourGlass(int[][]arr)
        {
            int noRow = arr.GetUpperBound(0);

            int noCol = arr[0].Length;
            
            int max = getHourGlass(arr, 0, 0);
            //arr has all the data now
            //we will get a hour glass at each position excpept the last two
            for (int i = 0; i <= noRow- 2; i++)
            {
                for (int j = 0; j < noCol - 2; j++)
                {
                   int current = getHourGlass(arr, i, j);
                   max = Math.Max(current, max);
                }

            }
            return max;
      }

private static int getHourGlass(int[][] arr, int r, int c)
        {
            int sum = 0; ;
            sum+= arr[r][ c] + arr[r][ c + 1] + arr[r][ c + 2] 
            + arr[r + 1][ c + 1] + arr[r + 2][ c] + arr[r + 2][ c + 1]
            + arr[r + 2][ c + 2];
            return sum;
        }

}