const cycles = (instruction: string): number => { if (instruction === "noop") return 1; if (instruction === "addx") return 2; return 0; }; export const main = async (lines: string[]): Promise => { const instructions = lines.map((line) => line.split(" ")); let signalStrength = 0; let cycle = 0; const registers = { x: 1 }; const dim = { width: 40, height: 6 }; const crt = Array(dim.width * dim.height).fill(""); for (const [instruction, operand] of instructions) { const instCycles = cycles(instruction); for (let i = 0; i < instCycles; i++) { const crtx = cycle % dim.width; crt[cycle] = [registers.x - 1, registers.x, registers.x + 1].includes( crtx ) ? "#" : "."; cycle++; if (cycle >= 20 && (cycle - 20) % 40 === 0) { signalStrength += registers.x * cycle; } } if (instruction === "addx") { registers.x += parseInt(operand); } } return Array(dim.height) .fill(null) .map((_, i) => crt.slice(dim.width * i, dim.width * (i + 1)).join("")) .join("\n"); }; // const isrun = process.argv.length > 1 && process.argv[1] === import.meta.path; if (isrun) { const file = Bun.file("./problem.txt"); const text = await file.text(); const lines = text.split("\n"); console.log("=== COMPUTATION ===\n"); const answer = await main(lines); console.log("\n=== /COMPUTATION ===\n"); console.log("=== ANSWER TO P2 ==="); console.log(answer); }