17 lines
No EOL
673 B
TypeScript
17 lines
No EOL
673 B
TypeScript
export async function solve() {
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return await Deno.readTextFile("./input.txt").then((f) =>
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f.split("\n").filter((l) => {
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const report = l.split(" ").map((s) => +s);
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const increasing = report[0] < report[1];
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let last = report[0];
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for (const number of report.slice(1)) {
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if (number > last && !increasing) return false;
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if (number < last && increasing) return false;
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if (Math.abs(number - last) < 1 || Math.abs(number - last) > 3) return false;
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last = number;
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}
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return true;
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}).reduce(acc => acc + 1, 0)
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);
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} |