55 lines
1.3 KiB
TypeScript
55 lines
1.3 KiB
TypeScript
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const fs = require('fs');
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const input = fs.readFileSync(__dirname + '/input.txt', 'utf8');
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const [initStr, gatesStr] = input.split("\n\n");
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const valMap: { [key: string]: number }= {};
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const gateMap: { [key: string]: [string, string, string] } = {};
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const outputWires: Array<string> = [];
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initStr.split("\n").forEach((s: string) => {
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const [wire, val] = s.split(': ');
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valMap[wire] = parseInt(val, 2);
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});
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gatesStr.split("\n").forEach((s: string) => {
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const [inp, out] = s.split(' -> ');
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const [val1, op, val2] = inp.split(' ');
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gateMap[out] = [val1, op, val2];
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if (out.startsWith('z')) {
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outputWires.push(out);
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}
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});
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function getWireVal(wire: string): number {
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if (Object.hasOwn(valMap, wire)) {
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return valMap[wire];
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}
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const val = getVal(...gateMap[wire])
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valMap[wire] = val;
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return val;
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}
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function getVal(wire1: string, op: string, wire2: string): number {
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const val1 = getWireVal(wire1);
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const val2 = getWireVal(wire2);
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return {
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AND: () => val1 & val2,
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OR: () => val1 | val2,
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XOR: () => val1 ^ val2,
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}[op]!();
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}
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outputWires.sort().reverse();
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let outputStr = '';
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outputWires.forEach((wire) => {
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outputStr += getWireVal(wire);
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});
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console.log(outputStr, parseInt(outputStr, 2));
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