Скачать или смотреть Advent of Code 2025 in Kotlin. Day 3.

Join us live for five days of Advent of Code puzzles and five Kotlin livestreams on December 1–5.
Solve the puzzles in Kotlin, climb the leaderboard, learn new tricks, and have a chance to win some prizes along the way! Details on how to take part: https://kotl.in/aoc25blg

Hang out with the supportive Kotlin community in Kotlinlang Slack: https://kotl.in/aoc25slack

Take part in our Kotlin leaderboards for a chance to win exclusive prizes:
Leaderboard 1: 2343137-c975ff11
Leaderboard 2: 2553918-98f6b5ed
Leaderboard 3: 2076885-6961eed5

We’ll have exclusive prizes for top performers and extra rewards for randomly selected participants who share their solutions on GitHub using the aoc-2025-in-kotlin topic.

The Kotlin Advent of Code GitHub template: https://kotl.in/aoc25tmplt

Check out solutions from previous years in idiomatic Kotlin: https://kotl.in/aoc25doc

Happy coding, and see you at Advent of Code in Kotlin!