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Every section has a unique ID number, and each Elf is assigned a range of section IDs.\n\n– [Advent of Code 2022, Day 4](https://adventofcode.com/2022/day/4)","pinned":false,"hidden":false,"mode":"md"},{"id":54,"value":"Plot.plot({\n marks: [\n Plot.ruleX(pairs, { // first\n x: (d, i) => i,\n y1: ([a]) => a[0],\n y2: ([a]) => a[1],\n stroke: \"steelblue\",\n strokeWidth\n }),\n Plot.ruleX(pairs, { // second\n x: (d, i) => i,\n y1: ([, b]) => b[0],\n y2: ([, b]) => b[1],\n stroke: \"goldenrod\",\n strokeWidth\n }),\n Plot.ruleX(pairs, { // overlap\n filter: overlap,\n x: (d, i) => i,\n y1: (d) => d.flat().sort()[1],\n y2: (d) => d.flat().sort()[2],\n stroke: \"black\",\n strokeWidth\n })\n ],\n width: strokeWidth * pairs.length + 30,\n marginLeft: 30,\n marginRight: 0\n})","pinned":true,"hidden":false,"mode":"ojs"},{"id":144,"value":"strokeWidth = 2","pinned":true,"hidden":false,"mode":"ojs"},{"id":117,"value":"part2 = pairs.filter(overlap)","pinned":true,"hidden":false,"mode":"ojs"},{"id":47,"value":"overlap = ([[a1, a2], [b1, b2]]) =>\n (b1 <= a1 && a1 <= b2) ||\n (b1 <= a2 && a2 <= b2) ||\n (a1 <= b1 && b1 <= a2) ||\n (a1 <= b2 && b2 <= a2)","pinned":true,"hidden":false,"mode":"ojs"},{"id":30,"value":"part1 = pairs.filter(\n ([[a1, a2], [b1, b2]]) => (b1 <= a1 && a2 <= b2) || (a1 <= b1 && b2 <= a2)\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":16,"value":"pairs = data\n .trim()\n .split(\"\\n\")\n .map((l) => l.split(\",\").map((a) => a.split(\"-\").map(Number)))","pinned":true,"hidden":false,"mode":"ojs"},{"id":10,"value":"sample = `\n2-4,6-8\n2-3,4-5\n5-7,7-9\n2-8,3-7\n6-6,4-6\n2-6,4-8\n`","pinned":true,"hidden":false,"mode":"ojs"},{"id":8,"value":"$30","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}