82 lines
3.1 KiB
Plaintext
82 lines
3.1 KiB
Plaintext
Advent of Code
|
|
|
|
br0xen 40*
|
|
|
|
• [About]
|
|
• [Stats]
|
|
• [Leaderboard]
|
|
• [Settings]
|
|
• [Log out]
|
|
|
|
--- Day 1: Not Quite Lisp ---
|
|
|
|
Santa was hoping for a white Christmas, but his weather machine's "snow" function is powered by
|
|
stars, and he's fresh out! To save Christmas, he needs you to collect fifty stars by December
|
|
25th.
|
|
|
|
Collect stars by helping Santa solve puzzles. Two puzzles will be made available on each day in
|
|
the advent calendar; the second puzzle is unlocked when you complete the first. Each puzzle
|
|
grants one star. Good luck!
|
|
|
|
Here's an easy puzzle to warm you up.
|
|
|
|
Santa is trying to deliver presents in a large apartment building, but he can't find the right
|
|
floor - the directions he got are a little confusing. He starts on the ground floor (floor 0)
|
|
and then follows the instructions one character at a time.
|
|
|
|
An opening parenthesis, (, means he should go up one floor, and a closing parenthesis, ), means
|
|
he should go down one floor.
|
|
|
|
The apartment building is very tall, and the basement is very deep; he will never find the top
|
|
or bottom floors.
|
|
|
|
For example:
|
|
|
|
• (()) and ()() both result in floor 0.
|
|
• ((( and (()(()( both result in floor 3.
|
|
• ))((((( also results in floor 3.
|
|
• ()) and ))( both result in floor -1 (the first basement level).
|
|
• ))) and )())()) both result in floor -3.
|
|
|
|
To what floor do the instructions take Santa?
|
|
|
|
Your puzzle answer was 138.
|
|
|
|
--- Part Two ---
|
|
|
|
Now, given the same instructions, find the position of the first character that causes him to
|
|
enter the basement (floor -1). The first character in the instructions has position 1, the
|
|
second character has position 2, and so on.
|
|
|
|
For example:
|
|
|
|
• ) causes him to enter the basement at character position 1.
|
|
• ()()) causes him to enter the basement at character position 5.
|
|
|
|
What is the position of the character that causes Santa to first enter the basement?
|
|
|
|
Your puzzle answer was 1771.
|
|
|
|
Both parts of this puzzle are complete! They provide two gold stars: **
|
|
|
|
At this point, you should return to your advent calendar and try another puzzle.
|
|
|
|
If you still want to see it, you can get your puzzle input.
|
|
|
|
You can also [Shareon Twitter Google+ Reddit] this puzzle.
|
|
|
|
References
|
|
|
|
Visible links
|
|
. http://adventofcode.com/
|
|
. http://adventofcode.com/about
|
|
. http://adventofcode.com/stats
|
|
. http://adventofcode.com/leaderboard
|
|
. http://adventofcode.com/settings
|
|
. http://adventofcode.com/auth/logout
|
|
. http://adventofcode.com/
|
|
. http://adventofcode.com/day/1/input
|
|
. https://twitter.com/intent/tweet?text=I%27ve+completed+%22Not+Quite+Lisp%22+%2D+Day+1+%2D+Advent+of+Code&url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F1&related=ericwastl&hashtags=AdventOfCode
|
|
. https://plus.google.com/share?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F1
|
|
. http://www.reddit.com/submit?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F1&title=I%27ve+completed+%22Not+Quite+Lisp%22+%2D+Day+1+%2D+Advent+of+Code
|