diff options
Diffstat (limited to 'aoc_2022/day-10/part_2.ts')
-rw-r--r-- | aoc_2022/day-10/part_2.ts | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/aoc_2022/day-10/part_2.ts b/aoc_2022/day-10/part_2.ts new file mode 100644 index 0000000..700ad19 --- /dev/null +++ b/aoc_2022/day-10/part_2.ts @@ -0,0 +1,59 @@ +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 }; + 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); +} |