Mercurial > repos > other > adventofcode2023
annotate day1.rb @ 21:46fb65f2cb94
Add Day 14 part 1 implementation
If you look at columns and see "how far can this go" then the
weight is just the sum of the partial triangle numbers of
highest_weight to highest_weight minus number of rocks that
can roll up to there.
Part 2 seems to involve actually moving the rocks, though!
author | IBBoard <dev@ibboard.co.uk> |
---|---|
date | Sat, 16 Dec 2023 10:29:36 +0000 |
parents | 76cc43966538 |
children |
rev | line source |
---|---|
0
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
1 #! /usr/bin/env ruby |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
2 |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
3 if ARGV.length != 1 |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
4 abort("Incorrect arguments - pass a single file") |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
5 elsif not File.exist? (ARGV[0]) |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
6 abort ("File #{ARGV[0]} did not exist") |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
7 end |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
8 |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
9 file = ARGV[0] |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
10 sum = 0 |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
11 File.open(file, "r").each_line do |line| |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
12 match = /^[^0-9]*([0-9]).*?(([0-9])[^0-9]*)?$/.match(line) |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
13 if match |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
14 first_num = match[1].to_i |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
15 second_num = match[3].nil? ? first_num : match[3].to_i |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
16 sum += (first_num * 10) + second_num |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
17 end |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
18 end |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
19 |
76cc43966538
Start https://adventofcode.com/2023/day/1 in Ruby
IBBoard <dev@ibboard.co.uk>
parents:
diff
changeset
|
20 puts sum |