35 lines
689 B
JavaScript
35 lines
689 B
JavaScript
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const fs = require('fs');
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const data = fs.readFileSync('input.txt', 'utf-8');
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const lines = data.split('\n');
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let instructions = [];
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lines.forEach((line, i) => {
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t = line.split(' ');
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instructions[i] = [t[0], parseInt(t[1])]
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})
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function loop (i, seen, acc) {
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if (seen.has(i)) {
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return acc;
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}
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seen.add(i);
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switch (instructions[i][0]) {
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case 'acc':
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acc+=instructions[i][1];
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i ++;
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break;
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case 'jmp':
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i += instructions[i][1];
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break;
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case 'nop':
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i ++;
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break;
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default:
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console.log('something went wrong. got instruction:', instruction[i][0]);
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}
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acc = loop(i, seen, acc);
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return acc;
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}
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loop(0, new Set(), 0)
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