Nick Thomas
f1be11fca8
git-subtree-dir: 2020 git-subtree-mainline:ab8f135946git-subtree-split:aaabfa90c9
39 lines
666 B
JavaScript
39 lines
666 B
JavaScript
const fs = require('fs');
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function parseLine(line) {
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let [ op, offset ] = line.split(' ');
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return { op: op, offset: Number(offset), visited: false };
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}
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fs.readFile('input', (err, data) => {
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if (err) throw err;
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let program = data.toString().split("\n").map( parseLine ).flat();
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let acc = 0;
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let pc = 0;
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while (true) {
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let insn = program[pc];
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if (insn.visited) {
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console.log(acc);
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break;
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}
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insn.visited = true;
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switch (insn.op) {
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case 'nop':
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pc++;
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break;
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case 'jmp':
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pc = pc + insn.offset;
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break;
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case 'acc':
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acc = acc + insn.offset;
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pc++;
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break;
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}
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}
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});
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