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

Added/updated problems

Browse Source
This commit is contained in:
Brian Buller
2019-11-08 15:01:07 -06:00
parent 83313cc77b
commit 0044574db3
27 changed files with 1816 additions and 430 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
2018/day07/go.mod
View File

@@ -1 +1,3 @@
module day07
go 1.13

70
2018/day07/problem
View File

@@ -2,18 +2,30 @@ Advent of Code
--- Day 7: The Sum of Its Parts ---
You find yourself standing on a snow-covered coastline; apparently, you landed a little off course. The region is too hilly to see the North Pole from here, but you do spot some Elves that seem to be trying to unpack
something that washed ashore. It's quite cold out, so you decide to risk creating a paradox by asking them for directions.
You find yourself standing on a snow-covered coastline; apparently, you
landed a little off course. The region is too hilly to see the North Pole
from here, but you do spot some Elves that seem to be trying to unpack
something that washed ashore. It's quite cold out, so you decide to risk
creating a paradox by asking them for directions.
"Oh, are you the search party?" Somehow, you can understand whatever Elves from the year 1018 speak; you assume it's Ancient Nordic Elvish. Could the device on your wrist also be a translator? "Those clothes don't look
very warm; take this." They hand you a heavy coat.
"Oh, are you the search party?" Somehow, you can understand whatever Elves
from the year 1018 speak; you assume it's Ancient Nordic Elvish. Could the
device on your wrist also be a translator? "Those clothes don't look very
warm; take this." They hand you a heavy coat.
"We do need to find our way back to the North Pole, but we have higher priorities at the moment. You see, believe it or not, this box contains something that will solve all of Santa's transportation problems - at
least, that's what it looks like from the pictures in the instructions." It doesn't seem like they can read whatever language it's in, but you can: "Sleigh kit. Some assembly required."
"We do need to find our way back to the North Pole, but we have higher
priorities at the moment. You see, believe it or not, this box contains
something that will solve all of Santa's transportation problems - at least,
that's what it looks like from the pictures in the instructions." It doesn't
seem like they can read whatever language it's in, but you can: "Sleigh kit.
Some assembly required."
"'Sleigh'? What a wonderful name! You must help us assemble this 'sleigh' at once!" They start excitedly pulling more parts out of the box.
"'Sleigh'? What a wonderful name! You must help us assemble this 'sleigh' at
once!" They start excitedly pulling more parts out of the box.
The instructions specify a series of steps and requirements about which steps must be finished before others can begin (your puzzle input). Each step is designated by a single letter. For example, suppose you have the
The instructions specify a series of steps and requirements about which
steps must be finished before others can begin (your puzzle input). Each
step is designated by a single letter. For example, suppose you have the
following instructions:
Step C must be finished before step A can begin.
@@ -32,12 +44,17 @@ Advent of Code
\ /
---->F-----
Your first goal is to determine the order in which the steps should be completed. If more than one step is ready, choose the step which is first alphabetically. In this example, the steps would be completed as follows:
Your first goal is to determine the order in which the steps should be
completed. If more than one step is ready, choose the step which is first
alphabetically. In this example, the steps would be completed as follows:
• Only C is available, and so it is done first.
• Next, both A and F are available. A is first alphabetically, so it is done next.
• Then, even though F was available earlier, steps B and D are now also available, and B is the first alphabetically of the three.
• After that, only D and F are available. E is not available because only some of its prerequisites are complete. Therefore, D is completed next.
• Next, both A and F are available. A is first alphabetically, so it is
done next.
• Then, even though F was available earlier, steps B and D are now also
available, and B is the first alphabetically of the three.
• After that, only D and F are available. E is not available because only
some of its prerequisites are complete. Therefore, D is completed next.
• F is the only choice, so it is done next.
• Finally, E is completed.
@@ -49,13 +66,19 @@ Advent of Code
--- Part Two ---
As you're about to begin construction, four of the Elves offer to help. "The sun will set soon; it'll go faster if we work together." Now, you need to account for multiple people working on steps simultaneously. If
multiple steps are available, workers should still begin them in alphabetical order.
As you're about to begin construction, four of the Elves offer to help. "The
sun will set soon; it'll go faster if we work together." Now, you need to
account for multiple people working on steps simultaneously. If multiple
steps are available, workers should still begin them in alphabetical order.
Each step takes 60 seconds plus an amount corresponding to its letter: A=1, B=2, C=3, and so on. So, step A takes 60+1=61 seconds, while step Z takes 60+26=86 seconds. No time is required between steps.
Each step takes 60 seconds plus an amount corresponding to its letter: A=1,
B=2, C=3, and so on. So, step A takes 60+1=61 seconds, while step Z takes
60+26=86 seconds. No time is required between steps.
To simplify things for the example, however, suppose you only have help from one Elf (a total of two workers) and that each step takes 60 fewer seconds (so that step A takes 1 second and step Z takes 26 seconds). Then,
using the same instructions as above, this is how each second would be spent:
To simplify things for the example, however, suppose you only have help from
one Elf (a total of two workers) and that each step takes 60 fewer seconds
(so that step A takes 1 second and step Z takes 26 seconds). Then, using the
same instructions as above, this is how each second would be spent:
Second Worker 1 Worker 2 Done
0 C .
@@ -75,14 +98,19 @@ Advent of Code
14 E . CABFD
15 . . CABFDE
Each row represents one second of time. The Second column identifies how many seconds have passed as of the beginning of that second. Each worker column shows the step that worker is currently doing (or . if they are
Each row represents one second of time. The Second column identifies how
many seconds have passed as of the beginning of that second. Each worker
column shows the step that worker is currently doing (or . if they are
idle). The Done column shows completed steps.
Note that the order of the steps has changed; this is because steps now take time to finish and multiple workers can begin multiple steps simultaneously.
Note that the order of the steps has changed; this is because steps now take
time to finish and multiple workers can begin multiple steps simultaneously.
In this example, it would take 15 seconds for two workers to complete these steps.
In this example, it would take 15 seconds for two workers to complete these
steps.
With 5 workers and the 60+ second step durations described above, how long will it take to complete all of the steps?
With 5 workers and the 60+ second step durations described above, how long
will it take to complete all of the steps?
Your puzzle answer was 903.