Advent of Code Leaderboard 2025 / Day 9

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Part 1Part 2PythonRustGoKotlinJavaScriptC#TypeScriptC++JavaCSwiftScalaRubyBash
# Template for reading all lines from stdin and printing the line count to stdout. # Copy this code to your IDE to get started. from sys import stdin lines = stdin.readlines() print(len(lines))
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Leaderboard

	Name	Language	Tokens Sum	Tokens Part 1	Tokens Part 2	Last change
1	N. Adhikary	Python	10045	45	-	6 days ago
2	Vadzim Kapichenka	Kotlin	10105	105	-	5 days ago
3	Akke	C	10109	109	-	5 days 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.