39 lines
1.4 KiB
JavaScript
39 lines
1.4 KiB
JavaScript
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import { readFileSync } from "fs";
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const input = readFileSync("packets.txt", "utf-8");
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function compareArrays(left, right) {
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let index = 0;
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while(true) {
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if(typeof left[index] === "undefined" && typeof right[index] === "undefined") return 0;
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else if(typeof left[index] === "undefined") return 1;
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else if(typeof right[index] === "undefined") return -1;
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else if(typeof left[index] === "object" && typeof right[index] === "object") {
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let a = compareArrays(left[index], right[index]);
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if(a === 1 || a === -1) return a;
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}
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else if(typeof left[index] === "object" && typeof right[index] === "number") {
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let a = compareArrays(left[index], [right[index]]);
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if(a === 1 || a === -1) return a;
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}
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else if(typeof left[index] === "number" && typeof right[index] === "object") {
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let a = compareArrays([left[index]], right[index]);
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if(a === 1 || a === -1) return a;
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}
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else if(typeof left[index] === "number" && typeof right[index] === "number" && left[index] !== right[index]) return left[index] < right[index] ? 1 : -1
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index++;
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}
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}
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let sum = 0;
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let currentPair = 1;
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input.split('\n\n').forEach(line => {
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const pair = line.split('\n');
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if(compareArrays(JSON.parse(pair[0]), JSON.parse(pair[1])) === 1) sum += currentPair;
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currentPair++;
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});
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console.log(sum)
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