Why are sets (via binary trees) in lesson 6?

[andrewhuang]

Exercise 4 in Homework 6
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[guoguo12]

Lesson 5, you mean? Not sure.
On Jul 13, 2015 9:42 AM, "Andrew Huang" notifications@github.com wrote:

.>?

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#13.

[guoguo12]

Should we take it out?

On Mon, Jul 13, 2015 at 12:56 PM, Allen Guo guoguo12@gmail.com wrote:

Lesson 5, you mean? Not sure.
On Jul 13, 2015 9:42 AM, "Andrew Huang" notifications@github.com wrote:

.>?

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#13.

[andrewhuang]

No. Don't go modifying lesson 6.