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Advent of Code Leaderboard 2025 / Day 5

View puzzle on adventofcode.com

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Leaderboard

Name Language Tokens Sum Tokens Part 1 Tokens Part 2 Last change
1 Profile imageVadzim Kapichenka Kotlin 214 88 126 7 hours ago
2 Profile imageAbbas Moosajee Python 264 105 159 24 hours ago
3 Profile imageFrederik Bonfanti Ruby 10054 54 - 21 hours ago
4 Profile imageValentin Slawicek Kotlin 10102 102 - 35 hours ago

Solutions with 1 unsolved part get a penalty of 10000 tokens (indicated with "-").

Rules

  • You're welcome to participate alone or in a team.
  • You may submit multiple solutions and explore different programming languages.
  • Stick to the standard library of your language, no further dependencies/libraries, except the ones which OneCompiler provides (e.g. NumPy for Python).
  • Ensure your code aligns to the template (Python, Rust, Go, Kotlin, JavaScript, C#, TypeScript, C++, Java, C, Swift, Scala, Ruby, Bash), reading the puzzle input from stdin (terminated with end-of-file), and printing the solution to stdout.
  • Please refrain from making network requests, reading data from files, or storing data in variable/function/class names for reflection.
  • Your code must be able to process all valid Advent of Code inputs. Golfcoder might reevaluate correctness of your solution with different inputs after your submission.

126 tokens in Kotlin for part 2 by Vadzim Kapichenka

Download solution

funmain()=println(
generateSequence(::readLine).takeWhile(String::isNotBlank).map{
it.split("-").map(String::toLong).let{it[0]..it[1]}
}.sortedBy{it.first}.fold(0L..0Lto0L){(prev,cnt),next->
(if(next.last<prev.last)prevelsenext)tocnt+(next.last+1-next.first.coerceAtLeast(prev.last+1)).coerceAtLeast(0)
}.second
)