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

2022 day 9 Formatted Problem

This commit is contained in:
Brian Buller 2022-12-09 09:04:01 -06:00
parent f5270a396a
commit b8dbc77821
1 changed files with 450 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

477
2022/day09/problem
View File

@ -1,24 +1,6 @@
Advent of Code
Advent of Code
• [About]
• [Events]
• [Shop]
• [Settings]
• [Log Out]
br0xen (AoC++) 16*
  0.0.0.0:2022
• [Calendar]
• [AoC++]
• [Sponsors]
• [Leaderboard]
• [Stats]
Our sponsors help make Advent of Code possible:
King - At King, we create unforgettable games (like Candy Crush) that are loved around the world. Join us to bring
moments of magic to hundreds of millions of people every single day!
br0xen (AoC++) 18*
--- Day 9: Rope Bridge ---
@ -280,11 +262,455 @@
Simulate your complete hypothetical series of motions. How many positions does the tail of the rope visit at least once?
To begin, get your puzzle input.
Your puzzle answer was 6090.
Answer: _____________________ [ [Submit] ]
--- Part Two ---
You can also [Shareon Twitter Mastodon] this puzzle.
A rope snaps! Suddenly, the river is getting a lot closer than you remember. The bridge is still there, but some of the
ropes that broke are now whipping toward you as you fall through the air!
The ropes are moving too quickly to grab; you only have a few seconds to choose how to arch your body to avoid being
hit. Fortunately, your simulation can be extended to support longer ropes.
Rather than two knots, you now must simulate a rope consisting of ten knots. One knot is still the head of the rope and
moves according to the series of motions. Each knot further down the rope follows the knot in front of it using the same
rules as before.
Using the same series of motions as the above example, but with the knots marked H, 1, 2, ..., 9, the motions now occur
as follows:
== Initial State ==
......
......
......
......
H..... (H covers 1, 2, 3, 4, 5, 6, 7, 8, 9, s)
== R 4 ==
......
......
......
......
1H.... (1 covers 2, 3, 4, 5, 6, 7, 8, 9, s)
......
......
......
......
21H... (2 covers 3, 4, 5, 6, 7, 8, 9, s)
......
......
......
......
321H.. (3 covers 4, 5, 6, 7, 8, 9, s)
......
......
......
......
4321H. (4 covers 5, 6, 7, 8, 9, s)
== U 4 ==
......
......
......
....H.
4321.. (4 covers 5, 6, 7, 8, 9, s)
......
......
....H.
.4321.
5..... (5 covers 6, 7, 8, 9, s)
......
....H.
....1.
.432..
5..... (5 covers 6, 7, 8, 9, s)
....H.
....1.
..432.
.5....
6..... (6 covers 7, 8, 9, s)
== L 3 ==
...H..
....1.
..432.
.5....
6..... (6 covers 7, 8, 9, s)
..H1..
...2..
..43..
.5....
6..... (6 covers 7, 8, 9, s)
.H1...
...2..
..43..
.5....
6..... (6 covers 7, 8, 9, s)
== D 1 ==
..1...
.H.2..
..43..
.5....
6..... (6 covers 7, 8, 9, s)
== R 4 ==
..1...
..H2..
..43..
.5....
6..... (6 covers 7, 8, 9, s)
..1...
...H.. (H covers 2)
..43..
.5....
6..... (6 covers 7, 8, 9, s)
......
...1H. (1 covers 2)
..43..
.5....
6..... (6 covers 7, 8, 9, s)
......
...21H
..43..
.5....
6..... (6 covers 7, 8, 9, s)
== D 1 ==
......
...21.
..43.H
.5....
6..... (6 covers 7, 8, 9, s)
== L 5 ==
......
...21.
..43H.
.5....
6..... (6 covers 7, 8, 9, s)
......
...21.
..4H.. (H covers 3)
.5....
6..... (6 covers 7, 8, 9, s)
......
...2..
..H1.. (H covers 4; 1 covers 3)
.5....
6..... (6 covers 7, 8, 9, s)
......
...2..
.H13.. (1 covers 4)
.5....
6..... (6 covers 7, 8, 9, s)
......
......
H123.. (2 covers 4)
.5....
6..... (6 covers 7, 8, 9, s)
== R 2 ==
......
......
.H23.. (H covers 1; 2 covers 4)
.5....
6..... (6 covers 7, 8, 9, s)
......
......
.1H3.. (H covers 2, 4)
.5....
6..... (6 covers 7, 8, 9, s)
Now, you need to keep track of the positions the new tail, 9, visits. In this example, the tail never moves, and so it
only visits 1 position. However, be careful: more types of motion are possible than before, so you might want to
visually compare your simulated rope to the one above.
Here's a larger example:
R 5
U 8
L 8
D 3
R 17
D 10
L 25
U 20
These motions occur as follows (individual steps are not shown):
== Initial State ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
...........H.............. (H covers 1, 2, 3, 4, 5, 6, 7, 8, 9, s)
..........................
..........................
..........................
..........................
..........................
== R 5 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
...........54321H......... (5 covers 6, 7, 8, 9, s)
..........................
..........................
..........................
..........................
..........................
== U 8 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
................H.........
................1.........
................2.........
................3.........
...............54.........
..............6...........
.............7............
............8.............
...........9.............. (9 covers s)
..........................
..........................
..........................
..........................
..........................
== L 8 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
........H1234.............
............5.............
............6.............
............7.............
............8.............
............9.............
..........................
..........................
...........s..............
..........................
..........................
..........................
..........................
..........................
== D 3 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
.........2345.............
........1...6.............
........H...7.............
............8.............
............9.............
..........................
..........................
...........s..............
..........................
..........................
..........................
..........................
..........................
== R 17 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
................987654321H
..........................
..........................
..........................
..........................
...........s..............
..........................
..........................
..........................
..........................
..........................
== D 10 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
...........s.........98765
.........................4
.........................3
.........................2
.........................1
.........................H
== L 25 ==
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
...........s..............
..........................
..........................
..........................
..........................
H123456789................
== U 20 ==
H.........................
1.........................
2.........................
3.........................
4.........................
5.........................
6.........................
7.........................
8.........................
9.........................
..........................
..........................
..........................
..........................
..........................
...........s..............
..........................
..........................
..........................
..........................
..........................
Now, the tail (9) visits 36 positions (including s) at least once:
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
..........................
#.........................
#.............###.........
#............#...#........
.#..........#.....#.......
..#..........#.....#......
...#........#.......#.....
....#......s.........#....
.....#..............#.....
......#............#......
.......#..........#.......
........#........#........
.........########.........
Simulate your complete series of motions on a larger rope with ten knots. How many positions does the tail of the rope
visit at least once?
Your puzzle answer was 2566.
Both parts of this puzzle are complete! They provide two gold stars: **
References
@ -292,7 +718,6 @@ References
. https://adventofcode.com/
. https://adventofcode.com/2022/about
. https://adventofcode.com/2022/events
. https://teespring.com/stores/advent-of-code
. https://adventofcode.com/2022/settings
. https://adventofcode.com/2022/auth/logout
. Advent of Code Supporter
@ -304,8 +729,6 @@ References
. https://adventofcode.com/2022/leaderboard
. https://adventofcode.com/2022/stats
. https://adventofcode.com/2022/sponsors
. https://careers.king.com/
. https://en.wikipedia.org/wiki/Planck_units#Planck_length
. https://adventofcode.com/2022
. https://adventofcode.com/2022/day/9/input
. https://twitter.com/intent/tweet?text=%22Rope+Bridge%22+%2D+Day+9+%2D+Advent+of+Code+2022&url=https%3A%2F%2Fadventofcode%2Ecom%2F2022%2Fday%2F9&related=ericwastl&hashtags=AdventOfCode
. javascript:void(0);