Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
Code block support is not fully rolled out yet but likely will be in the middle of the event. Try to share solutions as both code blocks and using something such as https://topaz.github.io/paste/ , pastebin, or github (code blocks to future proof it for when 0.19 comes out and since code blocks currently function in some apps and some instances as well if they are running a 0.19 beta)
FAQ
What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
Where do I participate?: https://adventofcode.com/
Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
# part 1
times = input[0][5..].split.map &.to_i
dists = input[1][9..].split.map &.to_i
prod = 1
times.each_with_index do |time, i|
start, last = find_poss(time, dists[i])
prod *= last - start + 1
end
puts prod
# part 2
time = input[0][5..].chars.reject!(' ').join.to_i64
dist = input[1][9..].chars.reject!(' ').join.to_i64
start, last = find_poss(time, dist)
puts last - start + 1
def find_poss(time, dist)
start = 0
last = 0
(1...time).each do |acc_time|
if (time-acc_time)*acc_time > dist
start = acc_time
break
end end
(1...time).reverse_each do |acc_time|
if (time-acc_time)*acc_time > dist
last = acc_time
break
end end
{start, last}
end
Crystal