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const cycles = (instruction: string): number => {
if (instruction === "noop") return 1;
if (instruction === "addx") return 2;
return 0;
};
export const main = async (lines: string[]): Promise<number | string> => {
const instructions = lines.map((line) => line.split(" "));
let signalStrength = 0;
let cycle = 0;
const registers = { x: 1 };
for (const [instruction, operand] of instructions) {
const instCycles = cycles(instruction);
for (let i = 0; i < instCycles; i++) {
cycle++;
if (cycle >= 20 && (cycle - 20) % 40 === 0) {
signalStrength += registers.x * cycle;
}
}
if (instruction === "addx") {
registers.x += parseInt(operand);
}
}
return signalStrength;
};
//
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 P1 ===");
console.log(answer);
}
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