## Walmart Labs Interview Question for Software Developers

Team: Customer experience
Country: United States
Interview Type: In-Person

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Give a piece of wood:
_____|______|_____

We want to find the least, and cheapest, way to cut it.
We also want to get the largest free cut as possible(if 1 cut gives two pieces).

``````Let's say we have 21 and we want to cut (7,7,6).
7+7+6 = 20 < 21

21 0
subtract 7 and add to right side
14 7
subtract 7 add to right size
7 14
subtract 6 add to right side
1 19
Now pick the one that minimizes |l - r|
which is 7 14
We already got 7 for "free"
Cost 14
Then recurse on the smallest side that you can take the largest cut of using the same technique:
14 0
7 7
0 14
|l-r| = 7 7
7 0
0 7
etc.
Cost = 27

Let's say we cut (9, 8, 3, 1)
21 0
12 9
4 17
1 20
0 21
Take the one that minimizes |l - r| = 12 9
We get 9 for "free"
Cost 12
12 0
4 8
1 11
|4 8|
etc.
Total cost 12 + 8 + 3

(6,6,6)
21 0
15 6
9 12
3 18
Take that one that minimized |l-r| = 9 12
Cost 12
9 0
3 6
0 9
|l-r| = 3 6
12 0
6 6
0 12
|l-r| = 6 6
Cost = 12 + 6 + 6

(1, 1, 1)
21 0
20 1
19 2
18 3
Minimize |l-r| = 18 3
cost 18 + 2 + 1``````

I believe this should work. The main idea is we want to make our first cut as close to n/2 as possible without making it impossible to to get the correct lengths down the line. By finding the cuts in this way, we are guaranteed that, by continuing to cut, we can get the corrects lengths afterwards.

Should work better than my previous attempt. Once again, if someone sees a problem. I would like to know.

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Awesome man..u nailed it

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What if you need to cut in (7, 7, 6) pieces.

Name:

Writing Code? Surround your code with {{{ and }}} to preserve whitespace.

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