func diagonalDifference(arr [][]int32) int32 {
	length := len(arr)

	var leftToRightSum int32 = 0
	var rightToLeftSum int32 = 0

	for x := range length {
		leftToRightSum += arr[x][x]
		rightToLeftSum += arr[x][length-1-x]
	}

	if leftToRightSum > rightToLeftSum {
		return leftToRightSum - rightToLeftSum
	}

	return rightToLeftSum - leftToRightSum