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Diffstat (limited to 'i-was-told-there-would-be-no-math/README.org')
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diff --git a/i-was-told-there-would-be-no-math/README.org b/i-was-told-there-would-be-no-math/README.org new file mode 100644 index 0000000..002ba32 --- /dev/null +++ b/i-was-told-there-would-be-no-math/README.org @@ -0,0 +1,42 @@ +See: https://adventofcode.com/2015/day/2 +** Part 1 +*** Purpose +Given a list of dimensions for multiple boxes in the form l \times w \times h: + +#+begin_example +2x3x4 +1x1x10 +3x6x9 +#+end_example + +We perform following calculation: + +#+begin_example +2*l*w + 2*w*h + 2*h*l +#+end_example + +Plus the length of the smallest side... so: +#+begin_example +2*l*w + 2*w*h + 2*h*l + min(l*w, w*h, h*l) +#+end_example + +*** Method +I'm not sure why this problem is titled "I was told there would be no math"---non-creative problems like these are easy to solve. + +It won't be hard to make the computer do the math: I'll start with the formula---a function which takes ~l,w,~ and ~h~, and does the above. + +Then parse a single line. +Then put it in a loop and total! + +** Part 2 +*** Purpose +The second part just gives us a new formula... + +#+begin_example +min(2*(l+w), 2(w*h), 2(h*l)) + l*w*h +#+end_example + +Yay... + +*** Method +Same as above |