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The "Fill the Tree Activity" Lesson is part of the full, Tree and Graph Data Structures course featured in this preview video. Here's what you'd learn in this lesson:

Bianca leads an activity to take an empty binary search tree and fill in its node values, given an array of numerical node values.

### Transcript from the "Fill the Tree Activity" Lesson

[00:00:00]

>> Bianca Gandolfo: Knowing what we know about binary search trees, take just two minutes. We don't need a break for this or anything. Just take two minutes to figure out which node goes where in this blank.

>> Bianca Gandolfo: Take two minutes to think about it and then we'll reconvene. All right, so, anyone know what this node is?

[00:00:29]

Five. Okay, how do we know that it's five?

>> Speaker 2: Started from the bottom left 1, 2, 3, 4, 5.

>> Bianca Gandolfo: That's how you did it. So you just started like, like the furthest left is going to be the minimum. Awesome. Anyone else figure that out in different way?

[00:00:50]

>> Bianca Gandolfo: No?

>> Speaker 3: Just on the mid point based on the weighted sides.

>> Bianca Gandolfo: Yeah, so you're like there's 4 less and there's 3 greater, so it has to be 5. Cuz here is 3 greater, here's 5, here's 4 less, yeah. That tends to be how I think about it.

[00:01:06]

Cool, so five here, and then here.

>> Speaker 3: 4.

>> Bianca Gandolfo: 4.

>> Speaker 2: 2.

>> Speaker 2: 1.

>> Speaker 2: 3.

>> Bianca Gandolfo: Great, I don't know why that one's not working.

>> Speaker 2: 7.

>> Speaker 2: 6.

>> Speaker 2: 8.

>> Bianca Gandolfo: Cool, awesome.

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