71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
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import { readGardenTypeMapData, toGardenMap, printGardenMap, getAreaById, getPerimeterById, GardenCell } from "./solve_1.ts";
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const pattern = {
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"0000": 4,
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"1000": 4,
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"0100": 0,
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"1100": 2,
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"0010": 4,
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"1010": 4,
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"0110": 2,
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"1110": 4,
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"0001": 0,
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"1001": 2,
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"0101": -2,
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"1101": -2,
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"0011": 0,
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"1011": 2,
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"0111": 0,
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"1111": 0,
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} as Record<string, number>;
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function getSideById(gardenMap: GardenCell[][]) {
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const sideById = new Map<number, number>();
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function addSide(id: number, side: number) {
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const currentSide = sideById.get(id) ?? 0;
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sideById.set(id, currentSide + side);
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}
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for (let i = 0; i < gardenMap.length; i++) {
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for (let j = 0; j < gardenMap[i].length; j++) {
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const cell = gardenMap[i][j];
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const id = cell.id;
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const sides = [
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gardenMap[i - 1]?.[j - 1]?.id ?? -1,
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gardenMap[i - 1]?.[j]?.id ?? -1,
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gardenMap[i - 1]?.[j + 1]?.id ?? -1,
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gardenMap[i]?.[j - 1]?.id ?? -1,
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];
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const sideKey = sides.map(s => s === id ? 1 : 0).join('');
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const addedSide = pattern[sideKey];
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addSide(id, addedSide!);
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}
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}
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return sideById;
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}
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if (import.meta.main) {
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const path = 'input.txt';
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// const path = "example_1.txt";
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// const path = "example_3.txt";
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// const path = "example_4.txt";
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// const path = "example_5.txt";
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const data = await readGardenTypeMapData(path);
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const {gardenMap, idMap } = toGardenMap(data);
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printGardenMap(gardenMap);
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const areaById = getAreaById(gardenMap);
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const sideById = getSideById(gardenMap);
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// console.log(areaById);
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// console.log(perimeterByType);
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const mixed = Array.from(areaById.keys()).map(id => ({
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id,
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type: idMap.get(id)!,
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area: areaById.get(id)!,
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side: sideById.get(id)!,
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}));
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console.log(mixed);
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const result = mixed.map(({ area, side }) => area * side).reduce((acc, val) => acc + val, 0);
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console.log(result);
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}
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