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Solve D02P02
+22
+22
day02/part1.ts
+22
day02/part1.ts
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import { readFileSync } from "fs";
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const ranges = readFileSync("./input.txt", "utf8")
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.split(",")
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.map((range) => {
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const [first, last] = range.split("-");
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return { first: Number(first), last: Number(last) };
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});
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let invalidIDsSum = 0;
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for (const { first, last } of ranges) {
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for (let i = first; i <= last; i++) {
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const id = String(i);
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if (id.slice(0, id.length / 2) === id.slice(id.length / 2)) {
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invalidIDsSum += i;
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}
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}
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}
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console.log(invalidIDsSum);