Day 2: Red-Nosed Reports
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FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/22323136
- 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
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4 points
*
Nim
Got correct answer for part 1 on first try, but website rejected it. Wasted some time debugging and trying different methods. Only to have the same answer accepted minutes later. =(
proc isSafe(report: seq[int]): bool =
let diffs = collect:
for i, n in report.toOpenArray(1, report.high): n - report[i]
(diffs.allIt(it > 0) or diffs.allIt(it < 0)) and diffs.allIt(it.abs in 1..3)
proc solve(input: string): AOCSolution[int, int] =
let lines = input.splitLines()
var reports: seq[seq[int]]
for line in lines:
reports.add line.split(' ').map(parseInt)
for report in reports:
if report.isSafe():
inc result.part1
inc result.part2
else:
for t in 0..report.high:
var mReport = report
mReport.delete t
if mReport.isSafe():
inc result.part2
break