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Diffstat (limited to 'not-quite-lisp/README.org')
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diff --git a/not-quite-lisp/README.org b/not-quite-lisp/README.org new file mode 100644 index 0000000..d701543 --- /dev/null +++ b/not-quite-lisp/README.org @@ -0,0 +1,20 @@ +See: https://adventofcode.com/2015/day/1 +** Part 1 +*** Purpose +Given a stream of parenthesis: + +#+begin_example +))((((( +#+end_example + +We subtract the number of "((" parens from the number of ")))". + +*** Method +The solution to this is simple: count the number of each, and perform the subtraction. Given that I already solved part on of this problem before, I will instead immediately design a solution to the problem that also works for part 2. In my attempt months ago, I made the "mistake" of not using a loop :): + +** Part 2 +*** Purpose +Now, we need to calculate the index of the input stream where the cumulative number is first zero. + +*** Method +The above information reveals that a solution that would work for both parts is a simple loop structure. |