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36 lines
769 B
JavaScript
36 lines
769 B
JavaScript
4 years ago
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const fs = require("fs");
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const input = fs.readFileSync("input", "utf-8").trim();
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const rows = input.split("\n");
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console.log("Num of rows:", rows.length);
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console.log("Column width:", rows[0].length);
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function run(dX, dY) {
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let countTrees = 0;
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let curX = 0;
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for (let curY = dY; curY < rows.length; curY += dY) {
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curX = (curX + dX) % rows[curY].length;
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const field = rows[curY][curX];
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if (field === "#") countTrees++;
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}
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return countTrees;
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}
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const runs = [
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[1, 1],
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[3, 1],
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[5, 1],
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[7, 1],
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[1, 2],
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];
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let solution = 1;
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for (const args of runs) {
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const countTrees = run(...args);
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console.log(`Right: ${args[0]}, down: ${args[1]}: Trees: ${countTrees}`);
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solution *= countTrees;
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}
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console.log("Solution:");
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console.log(solution);
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