brian/adventofcode
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Reflowed problems and added solutions

Browse Source
This commit is contained in:
Brian Buller
2018-03-15 11:24:23 -05:00
parent 986d17f104
commit 2a37946673
50 changed files with 2124 additions and 1464 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
2015/day03/problem
View File

@@ -1,64 +1,64 @@
Advent of Code
br0xen 40*
• [About]
• [Stats]
• [Leaderboard]
• [Settings]
• [Log out]
Advent of Code
--- Day 3: Perfectly Spherical Houses in a Vacuum ---
Santa is delivering presents to an infinite two-dimensional grid of houses.
He begins by delivering a present to the house at his starting location, and then an elf at the
North Pole calls him via radio and tells him where to move next. Moves are always exactly one
house to the north (^), south (v), east (>), or west (<). After each move, he delivers another
present to the house at his new location.
He begins by delivering a present to the house at his starting location, and
then an elf at the North Pole calls him via radio and tells him where to
move next. Moves are always exactly one house to the north (^), south (v),
east (>), or west (<). After each move, he delivers another present to the
house at his new location.
However, the elf back at the north pole has had a little too much eggnog, and so his directions
are a little off, and Santa ends up visiting some houses more than once. How many houses
receive at least one present?
However, the elf back at the north pole has had a little too much eggnog,
and so his directions are a little off, and Santa ends up visiting some
houses more than once. How many houses receive at least one present?
For example:
• > delivers presents to 2 houses: one at the starting location, and one to the east.
• ^>v< delivers presents to 4 houses in a square, including twice to the house at his
starting/ending location.
• ^v^v^v^v^v delivers a bunch of presents to some very lucky children at only 2 houses.
• > delivers presents to 2 houses: one at the starting location, and one
to the east.
• ^>v< delivers presents to 4 houses in a square, including twice to the
house at his starting/ending location.
• ^v^v^v^v^v delivers a bunch of presents to some very lucky children at
only 2 houses.
Your puzzle answer was 2572.
--- Part Two ---
The next year, to speed up the process, Santa creates a robot version of himself, Robo-Santa,
to deliver presents with him.
The next year, to speed up the process, Santa creates a robot version of
himself, Robo-Santa, to deliver presents with him.
Santa and Robo-Santa start at the same location (delivering two presents to the same starting
house), then take turns moving based on instructions from the elf, who is eggnoggedly reading
from the same script as the previous year.
Santa and Robo-Santa start at the same location (delivering two presents to
the same starting house), then take turns moving based on instructions from
the elf, who is eggnoggedly reading from the same script as the previous
year.
This year, how many houses receive at least one present?
For example:
• ^v delivers presents to 3 houses, because Santa goes north, and then Robo-Santa goes south.
• ^>v< now delivers presents to 3 houses, and Santa and Robo-Santa end up back where they
started.
• ^v^v^v^v^v now delivers presents to 11 houses, with Santa going one direction and
Robo-Santa going the other.
• ^v delivers presents to 3 houses, because Santa goes north, and then
Robo-Santa goes south.
• ^>v< now delivers presents to 3 houses, and Santa and Robo-Santa end up
back where they started.
• ^v^v^v^v^v now delivers presents to 11 houses, with Santa going one
direction and Robo-Santa going the other.
Your puzzle answer was 2631.
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.
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
@@ -70,6 +70,3 @@ References
. http://adventofcode.com/auth/logout
. http://adventofcode.com/
. http://adventofcode.com/day/3/input
. https://twitter.com/intent/tweet?text=I%27ve+completed+%22Perfectly+Spherical+Houses+in+a+Vacuum%22+%2D+Day+3+%2D+Advent+of+Code&url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F3&related=ericwastl&hashtags=AdventOfCode
. https://plus.google.com/share?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F3
. http://www.reddit.com/submit?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F3&title=I%27ve+completed+%22Perfectly+Spherical+Houses+in+a+Vacuum%22+%2D+Day+3+%2D+Advent+of+Code