Advent of Code 2025 | Mike Bostock | Observable

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Mike Bostock

@mbostock

Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.

Advent of Code 2025

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12

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AoC 2025 Day 1, Part 1

Dec 1, 2025

1

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AoC 2025 Day 1, Part 2

Dec 1, 2025

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AoC 2025 Day 2, Part 1

Dec 7, 2025

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AoC 2025 Day 2, Part 2

Dec 7, 2025

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AoC 2025 Day 3, Part 1

Dec 7, 2025

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AoC 2025 Day 3, Part 2

Dec 7, 2025

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AoC 2025 Day 4, Part 1

Dec 7, 2025

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AoC 2025 Day 4, Part 2

Dec 7, 2025

1

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AoC 2025 Day 5, Part 1

Dec 7, 2025

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AoC 2025 Day 5, Part 2

Dec 7, 2025

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AoC 2025 Day 6, Part 1

Dec 7, 2025

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AoC 2025 Day 6, Part 2

Dec 7, 2025

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AoC 2025 Day 7, Part 1

Dec 7, 2025

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AoC 2025 Day 7, Part 2

Dec 7, 2025

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AoC 2025 Day 8, Part 1

Dec 8, 2025

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AoC 2025 Day 8, Part 1

Dec 22, 2025